as you can see from one of the images, suspects one and two appear to be walking together through the marathon crowd on boylston street in the direction of the finish line. >> the fbi website crashed within moments of the images' release. thousands of tips have poured in since the attacks. those images released hours after the president and first lady attended a service to remember the victims of the bombings. cbs reporter vinita nair is in boston with more on how investigators sifted through all the potential leads to zero in on these two. >> reporter: the fbi considers these two suspects armed and extremely dangerous. we are finally seeing that surveillance video we have been hearing so much about and in it, you can clearly see these two suspects walking through the crowds at the boston marathon. reporter: they are among the most wanted men in america. the fbi released photos and videos of two men wanted for questioning in monday's deadly bombing at the boston marathon.

both men are seen walking through the crowd wearing baseball caps and carrying backpacks believed to be containing the bombs. >> suspect two set down a backpack at the site of the second explosion just in front of the forum restaurant. >> reporter: the were taken from security cameras near the bomb sites. investigators hope someone will recognize them and help law enforcement find them. >> though it may be difficult, the nation is counting on those with information to come forward and provide it to us. >> reporter: the big break in the case came just hours after president obama delivered a rousing speech to the bombing victims and to the city of boston itself at a service. [ applause ] >> reporter: president obama came to boston with an inspirational message for the victims of the marathon bombings including those who lost limbs in the attack. >> we will all be with you as you learn to stand and walk and, yes, run again. of that i have no doubt, you

will run again. [ applause ] >> reporter: the first lady and former massachusetts governor mitt romney were among the dignitaries who joined the president at the historic cathedral of the holy cross. the president said the deadly attack did not intimidate the city of boston. >> it should be pretty clear by now that they picked the wrong city to do it. not here in boston. >> reporter: the president also visited with marathon volunteers and thanked them for helping victims at the bombing site. the fbi says ever since they placed those two photos on their website, they have seen a record number of hits as well as a surge in the emails and phone calls the tips that they are receiving. one other tidbit to share with you at this hour. the fbi says there are logos on the baseball caps worn by those suspects. both logos were for bridgestone golf. reporting live in boston, vinita nair, back to you. >> quick question because i see more people walking behind you. has the mood lifted at all in town especially since the president was there?

>> reporter: you know, absolutely. and i think what the president had to say played a lot into the mood right now. a lot of people commenting on the fact that normally his presidential addresses after a tragedy like newtown or the aurora theater, they were really a message of mourning. but here today it was more about rallying the city so even though you see some closure still going on behind me, they are saying there is no possible threat and the president really calling for people to rally together. he reminded us that he went to school at harvard law so not far from here. he said boston, you are my home. >> vinita nair in boston, thank you. the bay area boy wounded in the bombings got a visit today from first lady michelle obama. she brought 11-year-old aaron hern some stuffed toys and a medal from the president. the martinez sixth grader is recovering from severe shrapnel wounds to his leg. his family says that he could be out of icu as soon as tomorrow. here again, the men known only as suspects one and two. tips are to be sent to the fbi. you can take a closer look at

those pictures on our website, kpix.com. earlier this week, an attack on a bay area substation. and tonight a pretty good indication that someone thinks it could happen again. kpix 5 reporter linda yee is outside a major pg&e facility in fremont where multiple officers are on patrol. linda. >> reporter: well, juliette, gh behind me you can see some of thheavy artillery. police have been here since tuesday when another pg&e substation was attacked by vandals. now, other pg&e facilities are also being fortified. but for security reasons, they are not telling us where or how many. heavily armed police guarded various points around the newark substation and supply yard. patrol cars parked strategically to block anyone from entering the property. pg&e says the extra security was added after another substation in the sauk bay was sabotaged two days ago. >> we have made sure that

additional security is located at our territory. we are working with law enforcement to determine how best to move forward with that increased security. >> reporter: police say on tuesday, someone with a high- powered rifle shot out five transformers at the metcalf substation in south san jose. minutes earlier someone climbed down a manhole to cut fiberoptic cables knocking out 911 service in gilroy. telephone lines were also disrupted at banks and other businesses. >> so i don't know what kind of sabotage but certainly it was an attempt to take down phones, data and power. >> reporter: pg&e said it did not get any specific threats at its other substations, but decided to ramp up security until further notice. >> we'll continue to provide that security and work with law enforcement until we have additional information. >> reporter: earlier they did bring in floodlights so you know, juliette, they will be here 24/7. >> so pg&e asked for this added

security does that tfo en rcemeng&e said that going to add up the costs and pay for it. but you have to wonder, juliette, that's going to be passed on to ratepayers. >> all right. linda, thank you. it was an explosion large enough to register as a magnitude 2.1 earthquake. [ explosion ] >> i can't hear! >> the explosion at a texas fertilizer plant killed 14 people including firefighters who rushed to the scene before the blast. cbs news reporter juan fernandez on part of a town that has been blown away. >> reporter: smoke is still pouring from the devastated community around the west fertilizer plant where rescue workers continued to search for survivors. the factory, about 20 miles outside waco, exploded last night with the force of a small earthquake. >> daddy, i can't hear, i can't

hear! >> reporter: the blast flattened a four-block area peeling away walls and rooftops. >> there are homes that are no longer homes. there are homes that have been flattened by the explosion. >> reporter: kevin smith didn't know what hit him. >> took a second or two to realize that the roof had caved in on me and so i knew it wasn't lightning. >> reporter: at first, emergency responders thought it was a bomb. >> a bomb just went off inside here. it's pretty bad. we got a lot of medown. >> reporter: some of those firefighters never made it out. ey we actually at the factory when it pledtrying to control the original fire. governor rick perry called it a nightmare scenario for this tight-knit community. >> this tragedy has most likely hit every family, touched practically everyone in that town. >> reporter: the wounded arrived at hospitals as far away as dallas. >> we're kind of going over them from head to toe, closely looking for missed injuries, injuries that are worsening. >> reporter: authorities say there is no sign of a crime.

but they need to wait for the scene to cool so they can start their investigation. i'm juan fernandez for cbs news, west, texas. paid or unpaid, the dangers they face are the same. bay area volunteer firefighters are mourning the loss of the volunteers lost in the texas explosion. just ahead what makes them want to serve. >> police should be doing their job not people on the internet. >> yes, the fbi is asking for the public's help. but not like this. how the crowd sourced investigating we told you about last night has already backfired big time. >> the wind has died down. and the sunshine is increased. so have temperatures. we're approaching 80 in some spots. find out when we'll be well into the 80s heading toward 90. that's coming up in my forecast. ,,,,,,

accused of threatening the nator. yes we can now show you the man accused of threatening the

president and a u.s. senator. this is him paul kevin curtis. that photo there. the justice department says the 45-year-old elvis impersonator sent letters laced with ricin to obama and mississippi senator roger wicker. it turns out wicker and curtis have met before. the senator hired curtis for a wedding and says he was quite entertaining. >> a bomb just went off inside here. it's pretty bad. we got a lot of firemen down. >> turning back now to the fertilizer plant explosion in texas, the first responders to that disaster were the volunteer firefighters. and as kpix 5's len ramirez shows us, the bay area depends on volunteers, as we len. >> reporter: that's right, allen. you know, small rural volunteer fire departments like this one on the outskirts of san jose are all over the country. they are staffed by men and women who don't receive a paycheck but don't hesitate when the call for service comes. reporter: are members

of the spring valley volunteer fire department's first-ever training academy going through their final exams. >> these guys put their hearts and souls into being a volunteer. it's not just like a hobby. it's something they're pretty dedicated to. >> reporter: the department is made up of 40 neighbors and people in the community who all have different day jobs. >> my day job is actually out back steak how the in campbell. >> reporter: but want to help. >> just contribute and give back to the community and just to protect the people up here. >> reporter: it was volunteer firefighters just like them who rushed to respond to the fertilizer plant fire and explosion in texas and some of those volunteers are among the missing. about 70% of the firefighters in america are volunteers. and the hazards they face don't discriminate between paid or unpaid. >> the danger is there. we're volunteers and we're -- the fire doesn't know any different. >> reporter: for that reasone t

volunteers as it is for paid firefighters. these recruits are finishing you -- finish -- finishing up a 7-month training academy and they must be certified by the state fire marshal before they can go into service, wear the badge and wait for the pager to gosignalling that someone they know it'sa ry difficjob and they are out here volunteering their time for -- and not getting paid, and they really enjoy it. that's why they do it. >> reporter: valley fire department here in san jose is typical. it receives no tax money. it's provided only for by the volunteers and people in the community who give them contributions. reporting live in san jose, len ramirez, kpix 5. now that we have video of the real suspects, what about all of the innocent marathon watchers who had their photos splashed across web pages and even newspaper pages? we have a backlash to the

amateur cyber sleuthing. >> speaking of a little cyber snooping, we are going to show you how to prevent your own computer from tracking every search.

these are the men the f-b-is actually looking for in connection with back to our top story, these are the men the fbi is

actually looking for in connection with the boston bombing. we see the real suspects after two days of amateur sleuthing that went in a somewhat problematic direction. mike sugerman joining us now. mike, we talked about this last night. and things didn't get they bitter. >> reporter: well, it did as people who were not suspects were presented as such. and millions saw and continue to see. reporter: yesterday we told you about problems both social and traditional media were causing on the internet. today it got worse. >> oh, my god. >> reporter: the "new york post" put two men on its front page described as suspects in the case. they aren't. >> the normal standards of adequacy when it comes to evidence are being lowered. >> reporter: ed wasserman is dean of the graduate school of journalism at uc-berkeley who like all of us are trying to sort through what can be done and what should be done in this era of instant communation. >> that's a problem because you're passing on information, you're correcting it as you go

along on the fly, but you really have no way to catch up the original misinformation. >> reporter: what the "new york post" published was already online from a poster who goes by 4 chan think tank we showed you yesterday. it now has 2.5 million hits. that's far more than the "new york post" circulation. >> this is basically an attempt to crowd source police work and, you know, the police should be doing their jobs, not people on the internet. >> reporter: in his raid no news class, students who have grown up knowing no other world without the internet aren't sure what can be done, if anything. >> the difference between being an amateur detective and an actual detective can result in some really bad consequences for people. >> reporter: cindy cone is with the electronic frontier foundation a group which advocates against internet restrictions. and even she has concerns advising people to use restraint posting things. >> think society just needs to sort it out. we are in the early days of social media. we'll sort out norms. i don't think a lot is needed. >> reporter: but law

enforcement is very concerned. >> other photos should not be deemed credible and they unnecessarily divert the public's attention in the wrong direction. >> reporter: to blur things more, of the websites has been putting up those pictures has asked the media to stop using them. so that's becoming confusing as to what the media is these day. it's called social media for a reason. mike sugerman, kpix 5. the earthquake was a defining moment in our city's history and i think it's very important that we remember that we honor those who came before us. >> today san francisco marked the anniversary of the 1906 earthquake. as per tradition there was a ceremonial painting of the one working fire hydrant that helped saved the mission. in past years, survivors would paint the hydrant. but this year was the first year no survivors attended the ceremony. marking the anniversary, mayor ed lee signed a new law designed to limit damage in the

next quake. it calls on homeowners to seismically strengthen so- called soft story buildings, ones with garages on the ground floor. more than 58,000 people live in them throughout the city. >> these are the kind of buildings that fell apart in the marina. and so we are about to make sure our city is safer by identifying these soft story buildings to be our next mandatory ordinance. >> the law covers soft story homes built before 1978 with three stories and multiple units, single-family homes not covered. got to remember our history, but you had to get out today and celebrate what we got today. it was so gorgeous. >> it was just about perfect. >> it was. >> because we're going to get warm and probably out of some folks' comfort zones. we are going to be trending warmer but today, man, right in that comfort zone. 70s except at the coasine right on the bay. here's what weather perfection looks like. we have the water, ocean behind

san francisco, and we have the sun. get any better? i don't think so. maybe hawaii? fiji? but if you are not on vacation, this will have to do and it is. 76 in concord. livermore at 77. san jose and santa rosa 75. it is cooler in oakland at 70. it's much cooler on the peninsula downtown san francisco at 61 degrees off of a high of about 65. so very nice outside leading to a beautiful evening and a pretty comfortable night tonight. chances are you'll be able to keep the windows open and not have too much of a problem. vallejo 49. fremont 50. redwood citile had mountain view overnight 58 degrees. hi-def doppler radar is dry. pollen count will stay high but also as high pressure gets closer temperatures go up. still plenty of storms out there. april can be wet in the pacific northwest. often we get a ridge of high pressure blocking the rain from us and rides over the ridge into british columbia, western washington, western oregon. but no rainfall for us because high pressure is not moving. if anything will inch a

little bit more offshore giving us a light flow out of the northwest keeping things cooler at the coastline so you will be the last to warm up. so warming will be slower if you live near the water. you're not going to see the peak of the heat until the top of next week. inland near 80 tomorrow. everybody gets close to the 80s except along the coastline starting monday as hig pressure builds fartheto the north giving us east offshore winds. we could see temperatures approaching 90 degrees away from the water with downtown san francisco perhaps hitting 80 degrees by next monday and next tuesday. so if you live inland if you live far away from the water you will be in the 80s starting tomorrow and that's where you stay. if you live near the bay your 80s will begin on monday and at the coastline you will see highs in the 70s come monday. high temperatures tomorrow 80 degrees for concord. san jose 81. oakland 72. all well above average. we are looking at low 80s for sunnyvale, los altos, 78 for redwood city. fremont 79. and milpitas 81 degrees. inland tomorrow concord beautiful sunshinesan ramon

80 antioch 80 fairfield 82. upper 70s for novato and sonoma. mid-70s for kentfield. peninsula cooler because of the onshore flow. sausalito 66, daly city 64 degrees. look at these temperatures! top of next week we are in the low 80s near the bay. top of next week, we are in the low 70s at the coastline. and we'll stay mild sunny and dry for the next seven days. coming up this monday is earth day. our own roberta gonzales is in oakland talking with students about climate change. >> reporter: yes, earlier today we were at san francisco city college to celebrate earth day. and now we have driven to oakland -- oh, you know what? i want to show you something. this is an exclusive because very few people have actually gotten a sneak peek inside of mobile weather. i call this the guts of our truck because it supplies us with lots of information like this, for example. it is currently 70 degrees. the winds are under 5 miles per hour right here in oakland. we're outside kdol-tv off tenth

fr ovl kland are ol tsud thering in that building right there to put on their very first news telecast and the subject matter is all going to be about earth day and climate change. so coming up at 6:00 tonight, we'll talk with some of those students and they will tell us what they've learned. reporting from oakland with mobile weather, roberta gonzales, kpix 5. >> all right. thanks, roberta. all right. you know how it works. you search for something like let's just say a new pair of pajamas online. then for weeks all the ads on your web browser tempt you with pjs. some with feet. [ laughter ] >> coming up, we'll show you how to keep your computer from tracking your ever search. ,,,,,,,,

private??? well, think again. a lot of do you think what you research and buy online is private? well, think again. a lot of companies are paying to know what you sl d do on the internet. but as kpix 5 consumerwatch reporter julie watts explains, thakes on ent's toyi practice. reporter: whether it's a vacation by the sea or just a p something on the internet and cnet's seth rosenblatt says it will probably come back to haunt you. >> the website broadcasts where you have been and what you're looking at. >> reporter: along with where you're located and your ip address. it's information tracking firms and ad agencies eagerly buy and immediately put to use. >> they use that information to determine what kinds of ads to show you next. >> reporter: that's why you may have noticed once you look at a product online, ads for the

items follow you around the internet for days. >> kind of creepiy. >> reporter: but this privacy researcher warns there is a more serious consequence. >> there are data brokers that partner with companies that collect a lot more information about you than you may realize. >> reporter: like very personal online research, like searches for medication or illnesses. yesterday, the federal trade commission called for a remedy. a simple and effective way for consumers to make it known they doesn't want their online activities monitored for marketing purposes. for now, antitracking software is a good place to start. only a few browsers give consumers options of blocking information about their activities. most users need what's known as an ad-on like this program called do not track me. >> this is all unobtrusive. it lives on your toolbar. >> reporter: the presoftware prevents you computer from software paing on information t uractivities s s tracking you don't expect all the adds to go away. even with so

see different ads from companies that aren't tracking you. the advertising industry is fighting back saying there are already safeguards in place and they are sufficient. but for a link to the do not track me program go to kpix.com/consumerwatch. >> okay. >> keep it private we'll be right back. ,,,,,,,,,,,,,,,,,,

remember the latest news and weather is always on cbs s-f dot-com. thanks for watching us at 5:00. "cbs evening news with scott pelley" is next. the latest news and weather are always on kpix.com. captions by: caption colorado comments@captioncolorado.com

>> p >> pelley: tonight, the f.b.i. has released pictures of suspects in the boston bombings. these men are now the target of a national manhunt. >> we consider them to be armed and extremely dangerous. >> pelley: bob orr and john miller are on the investigation. the president came to boston to lift the people's spirits, and he brought them to their feet. >> the world will return to this great american city to run harder than ever and to cheer even louder for the 118th boston marathon. >> pelley: major garrett is with the president. a catastrophic explosion devastates a texas town. ben tracey is on the scene. and saving the life of a child. elaine quijano with trac