on "world news tonight" this tuesday, the breaking news, the horrific images, the second american hostage apparently killed by the terrorist group isis. brian ross and martha raddatz standing by with what they're learning right now. the severe weather hitting tonight, tornados warnings in effect, twisters already doing damage. the lightning striking, the massive hail. ginger zee with a storm track right now. the stolen childhood tonight. we are just back from the syrian border, the children running from terror forced to work at 7,

8, 9 years old. is anyone helping the children? breaking tonight, what we're just now learning about how those private photographs were hacked, the famous faces, and this question, how safe are your photos? the one thing you should do right now. good evening. and it's great to have you with us here on a tuesday night. we begin with that horrific news, the new and gruesome video appearing to show a second american hostage executed by terrorists from isis. this time american juournalist steven sotloff two weeks after james foley lost his life. it was just days ago steven sotloff's mother beg is isis to spare her son. tonight an urgent manhunt for the mysterious man in a hood appearing now with a message now for president obama.

we have team coverage and we begin with abc's chief investigative correspondent brian ross. >> reporter: u.s. officials said today steven sotloff never had a once the 31-year-old american journalist was in the hands of the group. the emotional plea for his life from his mother clearly had no impact on her son's killers. >> i ask you to please release my child. as a mother, i ask your justice to be merciful and not punish my son for matters he has no control over. >> reporter: isis said it killed sotloff because of president obama's decision to continue the u.s. bombing of isis targets in iraq. today as the president left for meetings in europe over the threat from isis, the only comment came from his press secretary. >> our thoughts and prayer is first and foremost are with mr. sotloff and his family and those who worked with him. >> reporter: the graphic video today was titled a second message to america, posted online by a throw away e-mail

account and then distributed on social media. the hooded executioner appeared to be the same british accented speaker who, two weeks ago, bye headed james foley. >> you have been at the forefront of the aggression. >> reporter: investigators are already comparing the voices of the two videos, along with an analysis of a dessert setting, the speaker's use of his left hand to hold the knife, and his eyes. earlier facial recognition experts had created this likeness from an examination of the eyes from the last video, clean shaven and with a mustache, trying to figure out who was responsible. >> there's obviously a strong interest in identifying who and where does isis now continue to hold foreigners including americans. >> reporter: a spokesman for sotloff's parents said they are privately grieving the death of their son who before his capture a year ago covered conflicts from africa and the mid east.

>> he knew what he was doing. it wasn't a reckless thing. >> reporter: at the end of today's video, isis produced another western hostage, identified as a british citizen named david haines along with a warning in what they termed an evil alliance against isis. it's their belief isis is holding two aid workers who went to help civilian caught in the strife tonight. >> brian ross, thank you. that hooded terrorist from isis speaking directly to president obama today. the president headed to europe for a high stakes meeting with global leading, at the top of their agenda, what to do about the growing threat from isis. jon karl is traveling with the president. >> reporter: white house officials say the intelligence community is still working to confirm the authenticity of this tape, but officials tell me they have no doubt that it is real. the president has sought to

downplay the threat post by isis, but now with the second execution of an american and fears that the group holds two more, it's becoming a threat that's harder and harder to downplay, and as the president meets here with leaders in europe this week, the need to come up with a comprehensive strategy to confront isis is at the top of the agenda. >> more than 120 air strikes on iraq in just the last four weeks. we heard that message from the president. will this chaj the strategy going forward? >> i certainly think the execution of james foley was a wakeup call and this apparent execution will reinforce the resolve but it will not change the overall strategy. there's disgust and anger about this horrific murder, but the military, the president have to distance themselves emotionally when making decisions. the air strikes in northern iraq have been relentless, however.

the majority of them aimed at preventing isis from overtaking towns. as for syria, the white house press secretary said today, the president has been working closely with his team to review military options there. the surveillance flights over syria have been looking at isis movement, isis targets, and there are plenty of them. it's up to the president to decide if that is the route he wants to take, david. one more note from overseas, the pentagon confirming that usair strikes in somalia did happen, the target of al shabaab with links to al qaeda. there's no confirmation whether the leader was hit. we move on to the other developing headline at home, the severe storms, warnings in effect this evening. look at the weather wall right now. millions of americans on alert this evening, those storms on the move. in the midwest families cleaning up after an ef-1 tornado in

kansas, one of 13 reported tornados in just three states. listen to this. powerful lightning in iowa, storm chasers filming so close by they were injured. they are recovering tonight. ginger zee is covering it all. lightning with every storm is a major concerning but tonight we have severe storms. let me take you straight to the map. there have already been more than three dozen severe storm reports, still two pockets that we're watching there from western new york through central pennsylvania, northern maryland and then from kentucky into tennessee, that's tonight. tomorrow our attention turns to a brand new storm coming out of canada right there in the north rockies all the way to wisconsin involved and severe storms later this afternoon and evening tomorrow. of course a check of the tropics. we did get tropical storm dolly headed into mexico. norbert will stay west of mexico and baha but high surf

advisories for both areas. we're going to turn to the breaking headline late today over famous faces and their private photographs hacked. actress jennifer lawrence, kate upton, their personal photos posted online. we're learning about how this happened and we ask here how safe are your photos and the one thing you can do right now. abc's chief business correspondent rebecca jarvis tonight. >> reporter: tonight apple saying there was no breach in any of their systems, including icloud. instead, apple discovered a very targeted attack on certain celebrity accounts of their user names, passwords and security questions. >> what's your mother's maiden name, what's the name of your first pet? when you're talking about a celebrity you could probably get all this information from their wikipedia page. >> reporter: forensic hacking investigator vinny troia says there are deep underground networks of hackers all over the internet profiting from the trade and sale of photos like the ones involved in this

breach. >> it's almost like they have contests to see who can outdo each other. >> reporter: but the leak is also exposing just how vulnerable out bersonal information and pictures are on the internet. the solution lies in those passwords, the bane of our existence. they are the gatekeepers to our privacy. security experts say we must make them unique and change them often because a photo in the wrong hands can cause something much worse than embarrassment. it can even put you in danger. >> you can tell the latitude, the longitude and the altitude of where she was the moment it took that photo. >> reporter: with all that information out there, the single most effective thing you can do to protect your information online, don't just use a password. many websites now offer two-step verification. you want to choose that option. you will get an added layer of protection, david. >> rebecca, thank you. we're going to turn now to dramatic new details about the young girl just nine years old,

seen here at a shooting range in arizona, learning how to shoot an uzi when the unthinkable happens, she shoots and kills her instructor. that video is sparking debate tonight about guns and how young is too young. abc's clayton sandell now. >> reporter: tonight, the chaotic aftermath of a split-second accident. >> 911, what is your mergency? >> i have a gun range officer that got shot in the head. >> reporter: the moment a 9-year-old girl having fun with her family at a popular shooting range outside las vegas -- [ automatic gunfire ] >> reporter: --suddenly loses control of an automatic uzi submachine gun, shooting her instructor, 39-year-old charles vacca. >> is he breating? >> yes, he's having convulsions. >> reporter: according to a newly released police report, after pulling the trigger, the girl dropped the gun, grabbing her shoulder as if she was injured, telling her mother the gun was too much for her. the girl's father tells investigators nobody immediately

realized that vacca was gravely wounded. the shooting is renewing debate over how young is too young for kids on the firing line. individual ranges set their own age limits, sometimes as young as six. vacca's coworkers tried desperately to save his life. >> breathe, charlie, breathe. >> i don't think he's going to make it. >> reporter: tonight the girl's family says they are devastated by vacca's death and praying for his family. clayton sandell, abc news, denver. tonight with so many american children going back to school or getting ready to, an urgent crises halfway around the world, children who are not waiting for the bus, instead sent to work. their parents, once teachers, engineers in syria, now on the run. their children now supporting the family. tonight we report here on the stolen childhood. nearly 6,000 syrian children, refugees in lebanon. there could be up to 300,000 children working. as you're about to see right

here, in many cases, only the children get hired to work because they can pay the children much less. >> reporter: it's 6:00 a.m. and we're just three short miles from the syrian border. we're about to witness what has replaced the school day for a 10-year-old girl. they wake her, she gets dressed, and within minutes he is hand in hand with her friend. but there is no school bus waiting. instead a truck, the children soon spilling over. and we board the truck with them. they're not going to school. we are headed to the fields. she points out the way. >> this way? >> this way. >> reporter: the children, their tiny hands holding on, once from middle class families in syria, but now they are the ones who support their families. >> you're going to work on the potatoes, yes. >> reporter: 20 minutes on the truck and we spot them. the tractors, the farmers waiting for their little workers. they only hire children here because they know they can pay

them less. >> reporter: the little boys are likely making more than the little girls? >> in some questions l cases, yes. >> why is that? >> they say the boys are stronger than the boys. >> the tractors zoom by, dangerously close. this is the new normal for the children here just over the border from syrian in lebanon. many of them instead of going to school in the morning come here to the fields. you can see before the dust settles, the children gathering here with their bags to fill them with potatoes. in many cases they're now the sole bread winners. >> reporter: back breaking work, but they have not forgott what their life was once like. >> she wants to go to school? >> yes. >> reporter: they spend seven hours a day filling those sacks. >> is it full yet? >> she must put more inside. >> more inside he's saying? >> yes. >> reporter: this man, the farmer, is telling her she needs to put more in her bag.

we're talking about 8, 9, ten years old. >> we're talking from seven. >> reporter: it's not just the fields but the factories. we talked to this boy who now fixes tires. the children selling flowers in traffic. we meet a syrian refugee trying to sell us tissues through the window. she tells us she lost her mother in syria. but we would also deliver a sliver of hope. some of those same children after seven hours of hard labor still with a skip in their step. around this corner a tiny building and we could hear their voices. the kids are learning here? unicef trying to give them the school they missed. we asked the children how many of them came here after work? right down the line, their tiny hands fresh from the fields, proud of their hard work. >> 15? 50 potatoes, this big?

>> reporter: he points to his back. >> it hurts your back? >> a little bit. >> how many of you want to go home. >> reporter: it does not take them long to answer. instead, we return to the tent where they all began their day, returning with a song. the farmers in the field waiting for them again tomorrow. a stolen childhood, and we want you to know there are ways you can help. you can reach one of those classrooms. unicef telling us $15 can buy an entire classroom worth of supplies, pencils, paper, book. all the information is on abcnews.com. getting out, the dramatic test on camera, our reporter behind the wheel, his car under water. do you open the door or not? why the big change. also tonight, what we're now learning about joan rivers, word coming in from her family. and later here, we've all lost prized family photos. tonight the unknown couple from the heartland and every day

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excedrin migraine works. our "instant index" tonight, joan rivers, our daughter melissa confirming the 81-year-old remains on life support, adding, quote, i know my mother would be overwhelmed by the continuing outpouring of kindness. the family this evening thanking everyone for their prayers. a second chance for michael sam, cut over the weekend by the st. louis rams. this evening our partners at espn saying that the dallas cowboys intend to sign him to their practice squad. a sonogram, this little boy or girl giving us the thumb's up. look at this, one with something to say, another flashing a peace sign, and this one waving, hi mom and to all of america tonight. when we come back here, take a close look at these long lost family photonames, carrie and e

grossmann. tonight their niece telling us she's grateful. >> i really feel like the pictures have helped me to know harry and edna as very adventuresome people. >> reporter: they traveled to travel, to glaciers in alaska. >> edna was in a suit with pumps on and they were standing in a glacier. >> reporter: she says her aunt and uncles took pictures of the whole family, images they all thought were long lost. >> that's the one thing above else that makes me so happy. because harry and edna in some respects are still traveling. >> i just want to thank you for all those messages again today. what an honor to be here. we'll see you tomorrow. good night.