vinita nair with what the suspect is telling the investigators. some tough details today. >> reporter: that's right. the suspect is here at beth israel hospital where he is recovering from multiple gunshot wounds. you said the word clues. that's exactly what they are getting right now. it is very little in terms of the motive but today for the first time, we heard from the widow of the slain brother. a sign that read, we are boston strong, is now on the doors of boylston street apartment building that chris and lindsey returned to today. >> we are happy to be here. >> reporter: block by block, residents, business owners and workers were allowed back into the neighborhood the deadly bombings rocked eight days ago. >> we are safe and i think that was most important thing. >> reporter: the condition of 19-year-old bombing suspect johar tsarnaev has improved from serious to fair tuesday. he has been communicating with investigators mostly through writing because a gunshot wound to his neck has limited his ability to speak. sources tell cbs news the ra

live in boston, vinita nair. back to you. >>> it's not just law enforcement poring over the bomb evidence photographs. a bay area company saw those same photos and recognized one component as one of its own. new pictures released from the bombing site show a sub c3,000 battery made by tennergy based in fremont. the battery appears to be attached to black and red wires through the broken plastic cap. a spokesman for the company says the discovery cast a pall over their employees. >> appalled and shocked. these batteries are largely used for toys. rc cars and trucks. to see it used in sufficient a way just horrifying in such a way. >> the company says the battery in question was manufactured in china and is available in the united states. mostly hobby stores and online. the company is cooperating with the fbi. >>> police agencies from around the country are helping the boston investigators piece together the evidence. kpix 5's ken bastida joins us live from boston. >> reporter: how are you doing, allen? we are at t

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

i'm vinita nair. jason collins said if he had it his way, someone else would have been the first athlete in a u.s. professional sport to come out as gay. collins, a veteran of 12 seasons in the nba, disclosed he was gay in an article yesterday. he said he had gone to enormous lengths to live a lie. collins is a free agent and says he wants to continue playing and as tara mergener reports, he's receiving support from the hardwood to the white house. >> reporter: nba veteran jason collins opened a lot of eyes when he wrote these words in a "sports illustrated" article. i'm a 34 a-year-old nba center. i'm black and i'm gay and with one sentence he became the first openly gay professional athlete in a major american sport. >> all it takes is one brave person to stand forward and say i'm gay and that's going to open a door for a lot of other people. >> reporter: collins writes he made the decision to come out because he was tired of living a lie. it takes an enormous amount of energy to guard such a big se

i'm vinita nair. we begin this morning into the investigation of the boston marathon bombings. investigators are still trying to determine if the suspects acted alone. the chairman of the house intelligence committee, chairman mike rogers, says persons of interest are being sought, meanwhile the mother is coming under close scrutiny. during a wiretapped phone conversation with her older son, she's heard discussing jihad. ines ferre reports. >> reporter: lawmakers are questioning whether the boston bombing suspects may have had training from terrorists. the chairman of the homeland security system says the tsarnaev brothers used weapons similar to pakistan, afghanistan, and india. >> the experts agree there was someone who did train these two individuals. the question is where is that trainer or trainers? are they overseas in the chechen region or are they the in the united states? >> reporter: the fbi interviewed tamerlan tsarnaev in 2011 after russian authorities warned he might be a threat, but u.s.

vinita nair is in boston. derek valcourt in baltimore. adam may on the attack and we begin with vinita nair live in boston, with what police are learning about the bomb. >> reporter: big investigation here. cbs news can now confirm the name of a second victim. 29-year-old crystal campbell. she was hoping to take a photo of a friend as they crossed the finish line. and that is when the bombs detonated. we're also learning about the bombs, how they were constructed, authorities calling them crude but deadly. >> reporter: a law enforcement official tells cbs news, the bombs that exploded near the finish line of the boston marathon, were built and put into place to look like pieces of trash. the devices were put inside pressure cookers and placed inside bag. the pots were packed with nails and small metal pellets. >> we were maybe 10 feet from the explosion. >> reporter: nicholasiani and his wife are among those being treated for shrapnel injuries and pierced ear drums. >> i couldn't hear much. it was a lot of muffled, ringing sounds. >> more

but first, ninita nair is report-- vinita nair is reporting for us. >> reporter: well, the fbi just wrapped up a press conference, giving us the very latest on the investigation here in boston. we now know there is not a suspect. they tell us the saudi man they had questioned, whose home had been searched, was a victim himself, someone who was injured when those bombs were detonated. they are encouraging people to come forward with cell phone video, with any images they have of when those two bombs were detonated. >> reporter: a law enforcement official tells cbs news, the bombs that exploded near the finish line of the boston marathon, were built and put in place to look like pieces of trash. the devices were put inside pressure cookers and placed insiding bags. the pots were packed with nails and small metal pellets. >> we were maybe 10 feet away from the explosion. >> reporter: nicholas yanni and his wife are among the survive overs, -- survivors being treat federal are shrapnel injuries and pierced ear drums. >> i couldn't hear. there was a ringing sound. >> reporter: more than 130 hith

but we begin with vinita nair, she's at the scene in boston, with the very latest information as they search for a suspect, starting in boston. >> in this investigation here in boston. police still don't have a suspect's name. earlier, we had heard that they were talking to a saudi national, someone that was being questioned whose home had a search warrant executed on it. but now they are telling us, this man was a victim himself. someone who was injured when those two bombs were detonated. >> reporter: a law enforcement official tells cbs news, the bombs that exploded near the finish line of the boston marathon, were built and put in place to look like pieces of trash. [ explosion ] >> the devices were put inside pressure cookers and placed inside bags. the pots were packed with nails and small metal pellets. >> we were maybe 10 feet away from the explosion. >> reporter: nicholas yanni and his wife are among the survivors being treated for shrapnel injuries and pierced ear drums. >> i couldn't hear too much. it was just a lot of must haved, ringing sounds. >> reporter: more than 170

cbs reporter vinita nair is in boston with new details on how stigators ze ion em. >> reporter: the fbi considers these two suspects armed and ex- strangely dangerous. we saw the surveillance video we heard so much about and in it you can see the two suspects walking through the crowds at the boston marathon. 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 images 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

vinita nair is in boston with what the suspect is telling investigators. >> reporter: the suspect isat beth israel hospital recovering from recovering from gunshot wounds. you said the word clues. that's exactly what they are getting right now. he is talking but not saying much about his motive. but for the first time, we heard from the widow of the slain brother. a sign that read, we are boston strong, is now on the doors of boylston street apartment building that chris and lindsey returned to today. >> we are happy to be here. >> reporter: block by block, residents, business owners and workers were allowed back into the neighborhood the deadly bombings rocked eight days ago. >> we are safe and i think that was most important thing. >> reporter: the condition of 19-year-old bombing suspect johar tsarnaev has improved from serious to fair tuesday. he has been communicating with investigators mostly through writing because a gunshot wound to his neck has limited his ability to speak. sources tell cbs news the radical islamic views of tsarnaev's older brother were behind the bombing at