. >> reporter: mohammad jamal khweis is one of the few american isis foreign fighters we know of to walk out of isis-held territory alive. >> i didn't agree with their ideology. >> reporter: he's now a prisoner of the kurds and being interviewed by the f.b.i. a world away from the washington, d.c., suburb where he grew up in this townhouse. he says his parents emigrated from the palestinian territories. his father, a limo driver, says he's spoken to the state department and the f.b.i. about >> i have nothing to say. >> reporter: khweis graduated from alexandria, virginia's thomas edison high school in 2007 where friends describe him as a normal guy. >> he wasn't somebody who was like an outcast or anything like that. >> reporter: harrison weinhold says growing up, mohammad jamal khweis was known as "mo" or "michael" >> there wasn't anything that would lead me to believe that this was on the radar, that he's going to join isis. >> reporter: but khweis did join isis, and now investigators want to know how and why. u.s. authorities say in december of last year, khweis left baltimore nationa

. >> reporter: mohammad jamal khweis is one of the few american isis foreign fighters isis-held territory alive. >> i didn't agree with their ideology. >> reporter: he's now a prisoner of the kurds and being interviewed by the f.b.i. a world away from the washington, d.c., suburb where he grew up in this townhouse. he says his parents emigrated from the palestinian territories. he's spoken to the state department and the f.b.i. about his son. >> i have nothing to say. >> reporter: khweis graduated from alexandria, virginia's thomas edison high school in 2007 where friends describe him as a normal guy. >> he wasn't somebody who was like an outcast or anything like that. >> reporter: harrison weinhold says growing up, mohammad jamal khweis was known as "mo" or "michael" >> there wasn't anything that would lead me to believe that this was on the radar, that he's going to join isis. >> reporter: but khweis did join isis, and now investigators want to know how and why. u.s. authorities say in december of last year, khweis left baltimore national airport to england. he met a woman who took him

>> reporter: mohammad jamal khweis is one of the few american isis foreign fighters we know of to walk out of isis-held territory alive. >> i didn't agree with their ideology. >> reporter: he's now a prisoner of the kurds and being interviewed by the f.b.i. a world away from the washington, d.c., suburb where he grew up in this townhouse. he says his parents emigrated from the palestinian territories. his father, a limo driver, says he's spoken to the state >> i have nothing to say. >> reporter: khweis graduated from alexandria, virginia's thomas edison high school in 2007 where friends describe him as a normal guy. >> he wasn't somebody who was like an outcast or anything like that. >> reporter: harrison weinhold says growing up, mohammad jamal khweis was known as "mo" or "michael" >> there wasn't anything that would lead me to believe that this was on the radar, that he's going to join isis. >> reporter: but khweis did join isis, and now investigators want to know how and why. u.s. authorities say in december of last year, khweis left baltimore national airport to england. he met a w

. >> reporter: mohammad jamal khweis is one of the few american isis foreign fighters we know of to walk out of isis-held territory alive. >> i didn't agree with their ideology. >> reporter: he's now a prisoner of the kurds and being interviewed by the f.b.i. a world away from the washington, d.c., suburb where he grew up in this townhouse. he says his parents emigrated from the palestinian territories. his father, a limo driver, says he's spoken to the state department and the f.b.i. about his son. >> i have nothing to say. >> reporter: khweis graduated from alexandria, virginia's thomas edison high school in 2007 where friends describe him >> he wasn't somebody who was like an outcast or anything like that. >> reporter: harrison weinhold says growing up, mohammad jamal khweis was known as "mo" or "michael" >> there wasn't anything that would lead me to believe that this was on the radar, that he's going to join isis. >> reporter: but khweis did join isis, and now investigators want to know how and why. u.s. authorities say in december of last year, khweis left baltimore national airpor

. >> reporter: mohammad jamal khweis is one of the few american isis foreign fighters we know of to walk out of isis-held territory alive. >> i didn't agree with their ideology. >> reporter: he's now a prisoner of the kurds and being interviewed by the f.b.i. a world away from the washington, d.c., suburb where he grew up in this townhouse. from the palestinian territories. his father, a limo driver, says he's spoken to the state department and the f.b.i. about his son. >> i have nothing to say. >> reporter: khweis graduated from alexandria, virginia's thomas edison high school in 2007 where friends describe him as a normal guy. >> he wasn't somebody who was like an outcast or anything like that. >> reporter: harrison weinhold says growing up, mohammad jamal khweis was known as "mo" or "michael" >> there wasn't anything that would lead me to believe that this was on the radar, that he's going to join isis. >> reporter: but khweis did join isis, and now investigators want to know how and why. u.s. authorities say in december of last year, khweis left baltimore national airport to england.

. >> reporter: mohammad jamal khweis is one of the few american isis foreign fighters we know of to walk out of isis-held territory alive. >> i didn't agree with their ideology. >> reporter: he's now a prisoner of the kurds and being world away from the washington, d.c., suburb where he grew up in this townhouse. he says his parents emigrated from the palestinian territories. his father, a limo driver, says he's spoken to the state department and the f.b.i. about his son. >> i have nothing to say. >> reporter: khweis graduated from alexandria, virginia's thomas edison high school in 2007 where friends describe him as a normal guy. >> he wasn't somebody who was like an outcast or anything like that. >> reporter: harrison weinhold says growing up, mohammad jamal khweis was known as "mo" or "michael" >> there wasn't anything that would lead me to believe that this was on the radar, that he's going to join isis. >> reporter: but khweis did join isis, and now investigators want to know how and why. u.s. authorities say in december of last year, khweis left baltimore national airport to englan

. >> reporter: mohammad jamal khweis is one of the few american isis foreign fighters we know of to walk out of isis-held territory alive. >> i didn't agree with their ideology. >> reporter: he's now a prisoner of the kurds and being interviewed by the f.b.i. a world away from the washington, d.c., suburb where he grew up in this townhouse. he says his parents emigrated from the palestinian territories. his father, a limo driver, says he's spoken to the state department and the f.b.i. about his son. >> i have nothing to say. >> reporter: khweis graduated from alexandria, virginia's thomas edison high school in 2007 where friends describe him as a normal guy. >> he wasn't somebody who was like an outcast or anything like that. >> reporter: harrison weinhold says growing up, mohammad jamal khweis was known as "mo" or "michael" >> there wasn't anything that would lead me to believe that this was on the radar, that he's going to join isis. >> reporter: but khweis did join isis, and now investigators want to know how and why. u.s. authorities say in december of last year, khweis left baltimor

. >> reporter: mohammad jamal khweis is one of the few american isis foreign fighters we know of to walk out of isis-held territory alive. >> i didn't agree with their ideology. >> reporter: he's now a prisoner of the kurds and being interviewed by the f.b.i. a world away from the washington, d.c., suburb where he grew up in this townhouse. he says his parents emigrated from the palestinian territories. his father, a limo driver, says he's spoken to the state department and the f.b.i. about his son. >> i have nothing to say. >> reporter: khweis graduated from alexandria, virginia's thomas edison high school in 2007 where friends describe him as a normal guy. like an outcast or anything like that. >> reporter: harrison weinhold says growing up, mohammad jamal khweis was known as "mo" or "michael" >> there wasn't anything that would lead me to believe that this was on the radar, that he's going to join isis. >> reporter: but khweis did join isis, and now investigators want to know how and why. u.s. authorities say in december of last year, khweis left baltimore national airport to england.

. >> he says growing up, mohammad jamal khweis was known as mo or mike. >> there wasn't anything that would lead me to believe that this was on the radar that he is going to go join isis. >> khweis did join isis investigators want to know how and why. u.s. authorities say in december of last year, khweis left baltimore washington international airport for england there, he traveled to amsterdam, met a woman that took him to turkey and crossed into syria. he says, a month later, he decided a month later life with isis wasn't for him. and fled. >> our daily life was basically prayer, eating and learning about the religion for, about eight hours. >> it is not only foreign from the islamic state. in syria, holly williams spoke to a young man who fought for isis to be turned away by the group's dark side. he is treated like a dangerous criminal. and says he was trained to kill by isis. before being captured by kurdish soldiers. but mohammad is a frightened 18-year-old and asked us to hide his face for his mother's sake. she often told me to leave isis, he said. but i never obeyed her. he g

. >> reporter: mohammad jamal khweis is one of the few american isis foreign fighters we know of to walk out of isis-held territory alive. >> i didn't agree with their ideology. >> reporter: he's now a prisoner of the kurds and being interviewed by the f.b.i. a world away from the washington, d.c., suburb where he grew up in this townhouse. he says his parents emigrated from the palestinian territories. his father, a limo driver, says he's spoken to the state department and the f.b.i. about his son. >> i have nothing to say. >> reporter: khweis graduated from alexandria, virginia's thomas edison high school in as a normal guy. >> he wasn't somebody who was like an outcast or anything like that. >> reporter: harrison weinhold says growing up, mohammad jamal khweis was known as "mo" or "michael" >> there wasn't anything that would lead me to believe that this was on the radar, that he's going to join isis. >> reporter: but khweis did join isis, and now investigators want to know how and why. u.s. authorities say in december of last year, khweis left baltimore national airport to england. h

. >> he says growing up, mohammad jamal khweis was known as mo or mike. >> there wasn't anything that would lead me to believe that this was on the radar that he is going to go join isis. >> khweis did join isis investigators want to know how and why. u.s. authorities say in december of last year, khweis left baltimore washington international airport for england there, he traveled to amsterdam, met a woman that took him to turkey and crossed into syria. he decided a month later life with isis wasn't for him. and fled. >> our daily life was basically about the religion for, about eight hours. >> it is not only foreign fighters looking to get away from the islamic state. in syria, holly williams speck to a young man who fought for isis to be turned away by the group's dark side. he is treated like a dangerous criminal. and says he was trained to kill by isis. before being captured by kurdish soldiers. but mow haemd hammad is a frightened 18-year-old and asked us to hide his face for his mother's sake. she often told me to leave isis, he said. but i never obeyed her. he grew up in a mus

or anything like that. >> he says growing up, mohammad jamal khweis was known as mo or mike. >> there wasn't anything that would lead me to believe that this was on the radar that he is going to go join isis. >> khweis did join isis investigators want to know how and why. u.s. authorities say in december of last year, khweis left baltimore washington international airport for england there, he traveled to amsterdam, met a woman that took him to turkey and crossed into syria. he says, a month later, he decided a month later life with isis wasn't for him. and fled. >> our daily life was basically about the religion for, about eight hours. >> it is not only foreign fighters looking to get away from the islamic state. in syria, holly williams spoke to a young man who fought for isis to be turned away by the group's dark side. he is treated like a dangerous criminal. and says he was trained to kill by isis. before being captured by kurdish soldiers. but mohammad is a frightened 18-year-old and asked us to hide his face for his mother's sake. she often told me to leave isis, he said. but i

or anything like that. >> he says growing up, mohammad jamal khweis was known as mo or mike. >> there wasn't anything that would lead me to believe that this was on the radar that he is going to go join isis. >> khweis did join isis investigators want to know how and why. u.s. authorities say in december of last year, khweis left baltimore washington international airport for england there, he traveled to amsterdam, met a woman that took him to turkey and crossed into syria. he says, a month later, he decided a month later life with isis wasn't for him. and fled. >> our daily life was basically prayer, eating and learning about the religion for, about eight hours. >> it is not only foreign fighters looking to get away from the islamic state. in syria, holly williams spoke to a young man who fought for isis to be turned away by the group's dark side. he is treated like a dangerous criminal. and says he was trained to kill by isis. before being captured by kurdish soldiers. but mohammad is a frightened 18-year-old and asked us to hide his face for his mother's sake. she often told me to

. >> he says growing up, mohammad jamal khweis was known as mo or mike. >> there wasn't anything that would lead me to believe that this was on the radar that he is going to go join isis. >> khweis did join isis investigators want to know how and why. u.s. authorities say in december of last year, khweis left baltimore washington international airport for england there, he traveled to amsterdam, met a woman that took him to turkey and crossed into syria. he decided a month later life with isis wasn't for him. and fled. >> our daily life was basically prayer, eating and learning about the religion for, about eight hours. >> it is not only foreign fighters looking to get away from the islamic state. in syria, holly williams speck to a young man who fought for isis to be turned away by the group's dark side. he is treated like a dangerous criminal. and says he was trained to kill by isis. before being captured by kurdish soldiers. but mow haehammad is a frighten 18-year-old and asked us to hide his face for his mother's sake. she often told me to leave isis, he said. but i never obeyed h

>> reporter: mohammad jamal khweis is one of the few isis foreign fighters we know of to walk out of isis held territory alive. >> i didn't agree with their ideology. he is now a prisoner of the kurds and being interviewed by the fbi a world away from the washington d.c. suburb where he grew up in this townhouse. he says his parents emigrated from the palestinian territories. his father, a limo driver, says he has spoken to state department and the fbi about his son. >> i have nothing to say. khweis graduated from thomas edison high school in 2007. where friend describe him as a there mall guy. >> he wasn't an outcast. >> he says growing up, mohammad mike. >> there wasn't anything that would lead me to believe that this was on the radar that he is >> khweis d d join isis investigators want to know how and why. u.s. authorities say in december of last year, khweis left baltimore washington international airport for england there, he traveled to amsterdam, met a woman that took him to turkey and crossed into syria. he decided a month later life with isis wasn't for him. and fled. >> ou

or anything like that. >> he says growing up, mohammad jamal khweis was known as mo or mike. >> there wasn't anything that would lead me to believe that this was on the radar that he is going to go join isis. >> khweis did join isis investigators want to know how and why. u.s. authorities say in december of last year, khweis left baltimore washington international airport for england there, he traveled to amsterdam, met a woman that took him to turkey and crossed into syria. he decided a month later life with isis wasn't for him. and fled. prayer, eating and learning about the religion for, about eight hours. >> it is not only foreign fighters looking to get away from the islamic state. in syria, holly williams spoke to a young man who fought for isis to be turned away by the group's dark side. he is treated like a dangerous criminal. and says he was trained to kill by isis. before being captured by kurdish soldiers. but mohammad is a frightened 18-year-old and asked us to hide his face for his mother's sake. she often told me to leave isis, he said. but i never obeyed her. he grew up

. >> he says growing up, mohammad jamal khweis was known as mo or mike. >> there wasn't anything that would lead me to believe that this was on the radar that he is going to go join isis. >> khweis did join isis investigators want to know how and why. u.s. authorities say in december baltimore washington international airport for england there, he traveled to amsterdam, met a woman that took him to turkey and crossed into syria. he decided a month later life with isis wasn't for him. and fled. >> our daily life was basically prayer, eating and learning about the religion for, about eight hours. >> it is not only foreign fighters looking to get away from the islamic state. in syria, holly williams speck to a young man who fought for isis to be turned away by the group's dark side. criminal. and says he was trained to kill by isis. soldiers. but mow haemdhammad is a frightened 18-year-old and asked us to hide his face for his mother's sake. but i never obeyed her. he grew up in a muslim family in syria, but told us he knew very little about islam until he was recruited by an uncle and a

. >> reporter: just last week, american, mohammad jamal khweis surrendered to kurdish forces in northern iraq. he traveled from the washington, d.c. region to syria to join isis. and he was not known to the fbi. >> what you are seeing right now is, we are shaking every known bush. you are going to have a number that won't necessarily be on anyone's radar screen. that's something we need to be >> reporter: the couple behind december's san bernardino attack was not on the fbi radar either. scott, today, homeland security sent a bulletin to law enforcement agency as cross the country warning of the potential threats from isis. >> jeff pegues in the washington newsroom. jeff, thank you very much. the "cbs overnight news" will be >>> president obama left cuba tonight for argentina. he was in havana when he got word of the attacks in brussels. and did not allow the terrorists to change his travel plans. margaret brennan is with the president. >> reporter: in a secure call early this morning, president obama was briefed on the bombings. >> we will do whatever is necessary to support our friend

. >> reporter: just last week, american, mohammad jamal khweis surrendered to kurdish forces in northern iraq. he traveled from the washington, d.c. region to syria to join isis. and he was not known to the fbi. >> what you are seeing right now you are going to have a number that won't necessarily be on anyone's radar screen. that's something we need to be cognizant of. >> reporter: the couple behind december's san bernardino attack was not on the fbi radar either. scott, today, homeland security sent a bulletin to law enforcement agency as cross the country warning of the potential threats from isis. >> jeff pegues in the washington newsroom. jeff, thank you very much. right back. >>> president obama left cuba tonight for argentina. he was in havana when he got word of the attacks in brussels. and did not allow the terrorists to change his travel plans. margaret brennan is with the president. >> reporter: in a secure call early this morning, president obama was briefed on the bombings. >> we will do whatever is necessary to support our friend and ally belgium in bringing to justice thos

. >> reporter: just last week, american, mohammad jamal khweis surrendered to kurdish forces in northern iraq. he traveled from the washington, d.c. region to syria to join isis. and he was not known to the fbi. >> what you are seeing right now is, we are shaking every known bush. you are going to have a number that won't necessarily be on anyone's radar screen. that's something we need to be cognizant of. >> reporter: the couple behind december's san bernardino attack was not on the fbi radar either. scott, today, homeland security sent a bulletin to law enforcement agency as cross the country warning of the potential threats from isis. >> jeff pegues in the newsroom. jeff, thank you very much. the "cbs overnight news" will be right back. >>> president obama left cuba tonight for argentina. he was in havana when he got word of the attacks in brussels. and did not allow the terrorists to change his travel plans. margaret brennan is with the president. >> reporter: in a secure call early this morning, president obama was briefed on the bombings. >> we will do whatever is necessary to supp

. >> reporter: just last week, american, mohammad jamal khweis surrendered to kurdish forces in northern iraq. he traveled from the washington, d.c. region to syria to join isis. and he was not known to the fbi. >> what you are seeing right now is, we are shaking every known bush. you are going to have a number that won't necessarily be on anyone's radar screen. that's something we need to be cognizant of. >> reporter: the couple behind december's san bernardino attack was not on the fbi radar either. scott, today, homeland security enforcement agency as cross the country warning of the potential threats from isis. >> jeff pegues in the washington newsroom. jeff, thank you very much. right back. >>> president obama left cuba tonight for argentina. he was in havana when he got word of the attacks in brussels. and did not allow the terrorists to change his travel plans. margaret brennan is with the president. >> reporter: in a secure call early this morning, president obama was briefed on the bombings. >> we will do whatever is necessary to support our friend and ally belgium in bringing t

or anything like that. >> he says growing up, mohammad jamal khweis was known as mo or mike. >> there wasn't anything that would lead me to believe that this was on the radar that he is going to go join isis. >> khweis did join isis investigators want to know how and why. u.s. authorities say in december of last year, khweis left baltimore washington international airport for england there, he traveled to amsterdam, met a woman that took him to turkey and crossed into syria. he says, a month later, he decided a month later life with isis wasn't for him. >> our daily life was basically prayer, eating and learning about the religion for, about eight hours. >> it is not only foreign fighters looking to get away from the islamic state. in syria, holly williams spoke to a young man who fought for isis to be turned away by the group's dark side. he is treated like a dangerous criminal. and says he was trained to kill by isis. before being captured by kurdish soldiers. but mohammad is a frightened 18-year-old and asked us to hide his face for his mother's sake. she often told me to leave isi

. >> reporter: just last week, american, mohammad jamal khweis surrendered to kurdish forces in northern iraq. he traveled from the washington, d.c. region to syria to join isis. and he was not known to the fbi. >> what you are seeing right now is, we are shaking every known bush. you are going to have a number that won't necessarily be on anyone's radar screen. that's something we need to be cognizant of. >> reporter: the couple behind december's san bernardino attack was not on the fbi radar either. scott, today, homeland security sent a bulletin to law enforcement agency as cross the country warning of the potential threats from isis. >> jeff pegues in the washington newsroom. jeff, thank you very much. >>> president obama left cuba tonight for argentina. he was in havana when he got word of the attacks in brussels. and did not allow the terrorists to change his travel plans. margaret brennan is with the president. >> reporter: in a secure call early this morning, president obama was briefed on the bombings. >> we will do whatever is necessary to support our friend and ally belgium in

. >> reporter: just last week american mohammad jamal khweis surrendered to kurdish forces in northern iraq. he traveled from the washington, d.c. region to syria to join isis. and he was not known to the fbi. >> what you are seeing right now is, we are shaking every known bush. you are going to have a number that won't necessarily be on anyone's radar screen. that's something we need to be cognizant of. >> reporter: the couple behind december's san bernardino attack was not on the fbi radar either. scott, today, homeland security sent a bulletin to law enforcement agency as cross the country warning of the potential threats from isis. >> jeff pegues in the washington newsroom. jeff, thank you very much. the "cbs overnight news" will be right back. >>> president obama left cuba tonight for argentina. he was in havana when he got word of the attacks in brussels. and did not allow change his travel plans. margaret brennan is with the president. >> reporter: in a secure call early this morning, president obama was briefed on the bombings. >> we will do whatever is necessary to support our

. >> that man's uncle tells a nbc news that his name is mohammad jamal khweis. the kurdish military says he lines. commanders say he was carrying a large amount of cash, mobile phones, and three forms of identification including a u.s. driver's license. we have a crew down at his parents' house in the alexandria section of fairfax county. there a man confronted reporters and sprayed them with a garden hose before police arrived. >> he is my son. he is a good person. he's a good son. i raised my kids the right way, okay? and they are good boys. >> khweis' father did tell nbc news by phone he was going to the state department to find out if the reports are real or fake. shomari stone is working to learn more. we'll have a live report atop news4 at 5:00. chris, back to you. >> thanks, scott. >>> we're also following breaking news in the district where a teenager has just been shot in the shaw neighborhood. police say this happened right at the intse streets. we're told paramedics did rush the teenager to the hospital. he's in critical condition. police aren't sayin

the kurdish military says mohammad jamal khweis surrendered to them on the front lines near sinjar, not far from the border with syria. commanders say he was carrying a large amount of cash, cell phones, and three forms of identification including a u.s. driver's license. news4's shomari stone is outside a home in fairfax county. >> reporter: we tried to get answers from khweis' family here in the alexandria section of fairfax county. they were very upset. let's take a look just to show you. >> don't take a picture! >> i'm on public property. >> don't take a picture! >> reporter: earlier his confronted reporters and sprayed them with a garden hose. his uncle says he told him he was going to europe for vacation and when they last heard from him, he said he was in greece. khweis' father told nbc news he was going to the state department to find out if the reports are real or fake. >> he's my son. he's a good citizen, he's a good son. i raised my kids on the right way, okay? and they are good boys. >> reporter: now, we tried talking to neighbors out here. we knocked on some doors and they

. >> reporter: just last week, american mohammad jamal khweis surrendered to kurdish forces in northern iraq. he traveled from the washington, d.c. region to syria to join isis. and he was not known to the fbi. >> what you are seeing right now is, we are shaking every known bush. you are going to have a number anyone's radar screen. that's something we need to be cognizant of. >> reporter: the couple behind december's san bernardino attack was not on the fbi radar either. scott, today, homeland secururity sent a bulletin to law enforcement agency as cross the country warning of the potential threats from isis. >> jeff pegues in the washington newsroom. jeff, thank you very much. the "cbs overnight news" will be >>> president obama left cuba tonight for argentina. he was in havana when he got word of the attacks in brussels. and did not allow the terrorists to change his travel plans. margaret brennan is with the president. >> reporter: in a secure call early this morning, president obama was briefed on the bombings. >> we will do whatever is necessary to support our friend and ally belg

they told nbc news they're eager to question mohammad jamal khweis who may already be talking about how he was recruited and how he escaped. the kurdish station kurdistan 24 says they interviewed him. >> i was with a girl who her sister was previously married to a fighter for daesh. and she knew a connection to -- >> u.s. intelligence officials still have to confirm that this man in the video earlier this week, news 4 went to khweis' childhood home where the family told us he is not involved with terrorism. >>> officers are helping each other get through an emotional week as we learn how the prince george's county officer killed in sunday's police station attack will be remembered. the family of officer jacai colson requests that all of the events remain private. there will be two viewings, one next thursday in beltsville and a second in upper marlboro on friday followed by a memorial service at the church. officer colson's funeral will be held monday in his home state of pennsylvania. >>> 5:47. word of caution if you plan to extend your st. patrick's day celebrations. laurel police wil

. >> reporter: just last week, american, mohammad jamal khweis surrendered to kurdish forces in northern iraq. he traveled from the washington, d.c. region to syria to join isis. and he was not known to the fbi. >> what you are seeing right now is, we are shaking every known bush. you are going to have a number that won't necessarily be on anyone's radar screen. that's something we need to be cognizant of. >> reporter: the couple behind december's san bernardino attack scott, today, homeland security sent a bulletin to law enforcement agency as cross the country warning of the potential threats from isis. >> jeff pegues in the washington newsroom. jeff, thank you very much. from the captioning funded by cbs >>> it's wednesday, march 23rd, 2016. this is the "cbs morning news." >>> the hunt for a terrorist. belgium and the rest of europe are on alert after tuesday's bombings in brussels. this morning, the search is on for this man, believed to be one of the bombers who carried out the attacks. >>> we should not be allowing anyone to come to this country that we cannot vet to make sure

. >> reporter: just last week, american mohammad jamal khweis surrendered to kurdish forces in northern iraq. he traveled from the washington, d.c. region to syria to join isis. and he was not known to the fbi. >> what you are seeing right now is, we are shaking every known bush. you are going to have a number that won't necessarily be on anyone's radar screen. that's something we need to be >> reporter: the couple behind december's san bernardino attack was not on the fbi radar either. scott, today, homeland security sent a bulletin to law enforcement agency as cross the country warning of the potential threats from isis. >> jeff pegues in the washington newsroom. jeff, thank you very much. the "cbs overnight news" will be >>> president obama left cuba tonight for argentina. he was in havana when he got word of the attacks in brussels. and did not allow the terrorists to change his travel plans. margaret brennan is with the >> reporter: in a secure call early this morning, president obama was briefed on the bombings. >> we will do whatever is necessary to support our friend and ally be