tomorrow night, the very latest on the bombing investigation, plus the heroes who ran to help the engine moments after the blast. the stories are uplifting and simply remarkable. that's all for us tonight. now, "anderson cooper." piers, thanks very much. good evening, everyone. 10:00 here in boston and there is breaking news tonight. in fact, a lot of news to tell you about in this hour ahead. the boston globe reporting the massachusetts antiterror intelligence units were not told back in 2011 that the fbi had looked back into the older subject. tamerlan. because of that, neither they nor other state agencies were ever in a position to help evaluate the relevance of this trip to russia last year.

we're going to have more on this tonight trying to sort it all out. also, tonight, was new york city next? or was another bombing planned for here in the boston area, instead. top officials weighing in on both sides. there seem to be competing narratives on this starting this afternoon with this press conference. >> last night we were informed by the fbi that the surviving attacker revealed that new york city was next on their list of targets. he told the fbi apparently that he and his brother had intended to drive to new york and detonate additional explosives in times square. >> now, the younger suspect reportedly said that in a second round of questioning by interrogators, not to party as he first reportedly said, but to use their remaining explosives where they'd do the most carnage. now, that is one view. but that said, the other view comes from someone also in a position who you would assume would know things, house intelligence mie rogers. listen.

>> what we know happened is that we do believe they had a plan for another attack. they had actually built the devices and not used them, but from the investigators i have been talking to, they believe it was going to be probably more likely in the boston area. they needed to generate some cash, the hijacking, the theft of the credit card or the atm cards and that kind of thing, the robbery, all of that was designed to get them ready, we believe at this point, to go to new york. it's not clear to me that they were actually going to set those devices off even though they had them with them. so it certainly would make it a plausible thing to have happen, but it's more plausible to me that they were going to do another event in the boston area and they were hiding out in new york city was their plan. >> chairman rogers also said there are quote, persons of interest that we are very concerned about, talking in the present tense. whether that means here or in russia, where the suspects have roots, he would not definitively say. he suggested that some of the focus would be here, where the

two suspects obviously lived. when asked point-blank whether these persons of interest are either here or in russia, the conversation turned toward cooperation with russia and suggesting that authorities there are not providing cooperation with the american counterparts. also in russia, late word that the suspect's father has been taken to the hospital. he was supposed to travel here today or tomorrow, but again, a lot of the statements being made by the parents are pretty unreliable and contradictory. the mother, meantime, called a press conference, called it all a setup, says her sons did not do this. she pointed out that she hasn't seen her sons in about a year. we're going to dig deeper on whether the suspect was read his mir ran da rights prematurely. they have some very strong opinions on that. and later, sanjay gupta looks at what life was like for all the people who have lost limb ins this bombing.

the fresh steps they take as they try to learn to walk again. in the case of adrianne, as you just saw there, to dance again. another very full night starting with mary snow in times square in new york. mary, nick payton-walsh is also in russia, in dagestan, former massachusetts homeland security advisor juliette kayyem is currently a boston globe columnist. on the phone, joining us is former homeland security advisor fran townsend, who currently sits on the homeland security and cia external advisory panels. appreciate all of you being with us. >> what you're hearing is they were informed in the sense that they had access to the data base. but they were not specifically told that we have someone on your streets that we are specifically concerned with. this is troubling because it is consistent with the feeling that the f.b.i. never thought much of this guy, right? that the original investigation did not show much. and there's a lot of history in this city that the relationship between the fbi and state and

local oe officiafficials. we saw a lot of harmony in the last week. what we're starting to hear wait? why weren't we told? >> and that's where these leaks, it seems like, are coming from. >> right. >> people are anowed locally at the state level or the federal level and that's why they're kind of sending out this information. it seems like, at the very least, a phone call to local terror officials would be not only a courtesy, but a sensible -- >> right. so what we don't know is how many of these did the fbi get in boston. there's lots of cases that aren't documents. but the truth is, if they weren't specifically told, hey, there's a guy here living down the street in cambridge and we did this investigation and didn't find anything, but we thought you should know. that cuts again what was learned in 9/11 with state and locals who were the first responders. it's the police here, the state

police, that were sort of the last to know. >> state and local governments have their own representatives who have access to federal terrorism data bases. do they have a point there. >> well, it is true, anderson, they do. but as we talked about before, there are hundreds of thousands of names in that data base you're talking about. so that's why you talk about cutting a lead. directing local officials that you're sitting with to look a particular name or a particular case when it's been added or because there's been a particular inquiry from a foreign government, even if you've closed the case. so it really isn't enough to say well, you were sitting in front of this computer and you had access to a list with, you know, hundreds of thousands of names on it.

that's not what the centers were meant to be about. the whole point of the force is to work cooperatively in your geographic location. so access to the data base really isn't enough. >> right. juliette, why wouldn't an fbi official, if they're on this task force, walk down the hall and say by the way, we interviewed this person who live ins boss ton. just a heads up? >> that was what should happen. that was the creation his family was describing of these fusion centers. there's a whole apparatus and architecture that was created after 9/11 because of the lessons learned. so depending on how this particular story that the globe is reporting on unfolds, it is dismaying for this city to learn wa wait, there was an entity that knew that he was on some lisz. >> it's also drip and drap that this information seems to be leaking out from federal and

local. why doesn't somebody with the information just put it all out there? >> i think each agency is trying to figure out what they did. so before that becomes a sort of one against the other, which is both unbecoming and unhealthful to learn any lessons from this, whether there's some entity to say everyone, let's figure out what the story line is, the accurate story line, so that we can, you know, as i've often been saying, we can learn from it. we can't go back. but we can learn from what were the errors. >> let's talk, also, about were more actions planned here in the boston area, as mike rogers has indicated to people or was new york the target. you pointed out, in our 8:00 hour, that they're not exclusive. previously, they had devices that they had planned to utilize to set off in the boston area, if, in fact, these two suspects are guilty. but in sort of the last minute, they needed to get out of the

town, they were like, well, we'll go to new york. >> so that's consistent with what the boston police clearly felt, which was why are they still here? that's the question i was asked and justifies the shut down. that was very scary for them. the fact that they carjacked the car, asked for his atm, wanted to get the money and seemed not to have an exit strategy suggest that they were going to do more here and who knows what their long term plan was. they, then, panicked. they go on this spree and the fact that they wanted to get down to new york might be just some, you know, wild escape plan that they thought could work. they clearly had more weaponry. and that's what, you know, the fact that they were trying to get on a road to new york must be scary to new york. >> nick, we're learning new details about the mother being placed on the cia watch list. what do you know about that? >> and, also, are the russians cooperating with u.s. officials? >> the first point you make, we don't know much details about why that happened.

>> came into their lives, made them feel ashamed to not have been devout in their muslim lives. on the topic of russian cooperation, i should point out it's unfashionable to defend the kremlin in many times. but there do appear to be two times with warnings and concerns and the family. interviews happened and then there seems to be a bit of a stand off there where, effectively, we've always seen the russians say we're dealing with global terrorism here in this part of the world. that's always considered to be exaggerated by many u.s. officials.

now i think it's great to accept. and then you have that cold war stand off where both of these sides still mistrust from about 20, 30 years ago and often feed into the conversation. there's no reason to suggest that the russians are hiding something. but both sides run the risk of giving the other side information which gives their opponent, potentially, the ability to blame the other from holding something back. anderson? >> that was the other comment made by chairman mike rogers that the russians are not cooperating as much as the u.s. would like. fran, nick, appreciate it. julliette is going to stick around because we want to talk about other potential influences on the suspects. and later tonight, i really hope you stick around. you're going to meet a first responder, a firefighter, a paramedic from the lynn fire department which is near here in boston, received medical training just in time on the day of the bombing to save the young girl's life. >> i don't know if it was just television or fate or whatever it was. but i just looked and focused and i just saw this one child in

the middle of the street just sitting there with this dazed, shocked look.

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a lot of new information coming in to us. the chairman casting doubt that times square was the alleged bombers next target. he also suggested there were more persons of interest in the case. now, we don't have an answer to that. we do know that authorities have arrested two people in the area. last friday, they questioned a 20-year-old who tweeted with younger suspects. he has learned that at least five fbi agents talked with him over the weekend. >> and this really speaks to the nature of the exhaustive search that's going on by the fbi to find out if there is anybody else involved. there was a high school classmate of dzhokhar tsarnaev who tweeted him about fireworks back in march. we found those tweets. i looked at them. i think you can see some of them on the screen right now specifically talking about blowing off some fireworks.

well, it was last sunday that five fbi ajents came to a neighborhood in chelsea, tracked down this high school friend of dzhokhar, according to his father, and questioned him all about these tweets. we talked to the father. he said the fbi agents were very thorough, trying to find out everything they could about these specific tweets. we know his college friends have been questioned, high school friends have been questioned. anybody who had any contact with him. >> and of all of this, these two other people, i believe they were originally from kazakhstan, they are still in custody. >> russian-speaking, foreign students who were at umass -- dartmouth. >> yes, excuse me. it's been a long week. they were arrested and taken into custody last friday. remember, this before yohan tsarnaev was captured. the fbi really believed dzhokhar

was really in that apartment. the reason is is because he shared an actual cell phone with dzhokhar. they shared the same telephone. and they were following that phone. so they believe the signal was coming from there. it must have been there. >> i remember chris lawrence was actually on the campus on friday and reported on seeing the blackhawk helicopter landing. >> that's what it was all about. local police had no idea the fbi was coming. it was a surprise raid. very heavy handed. those two students are now being held by immigration service on a visa violation. it's odd that they're being held this long. we are being told that that's out of an abundance of caution. there's no connection between these fellas to what happened here on marathon day. they're still being held by their backgrounds. >> fascinating. i want to dig deeper now into the influences on the older and the younger suspect. how they may have become radicalized.

particularly the older brother, who, if anyone, may have helped along the way. our other breaking news, their mother has been added to a federal terror data base. bob, you said earlier that the more you hear about this case, the more you do not think the suspects acted alone. you say authorities are clearly looking for accomplices overseas? >> i think absolutely, anderson. you know, i'm still on this kick about the explosives and the devices and i've called everybody i know who makes these things, who put them together. and everybody says to an expert, that somebody showed them how to do it. you have an x-box or basically a pad, the young kid, you know, they don't go out and teach themselves this. you know, if you work in a radio store, yes, you could. if you -- that sort of geek, yeah, you can put it all together using cell phones or toys or the rest of it.

but i don't see these two kids, what i know about them, doij it. i think the trip, of course, like everybody else, he went there and the chances of him making contact with a solif is pretty good. i spend about four or five years investigating the london bombers, the madrid train bombers and the rest of it. and they all seem to come back to, as we've been using the word, charismatic guide, who will sit down in the mosque with them and explain them the real islam. i know you can get on the internet. you can read this stuff and you can take orders from the internet all you want. but young men like this are looking for guidance. this jihad mentality, globalist mentality. and i think this is the best explanation. i also think it's the reason the fbi is seriously looking for accomplices. you know, they've been sending back to dagistan, they've been making raids. >> but in your opinion, it

doesn't necessarily mean that somebody kind of directed them to do this particular bombing. it could be somebody who made the devices around they came up with their own plan? >> yeah, i think that's the logic. go back to the united states, kill as many people as you can. the two brothers think boston marathon, times square, it doesn't really matter. you know what they don't want is be connected by cell phone to foreign cell groups. they don't want money transfers. and they don't want orders coming from orr seas because it's all intercepted. just go and kill as many people as you can. this is why this discussion about hitting new york or other targets in boston seem very fluid to us. it doesn't sound very military. but in that world of trying to hide what they're doing, it makes sense. >> juliette, unless there's

cooperation from russian authorities and unless russian authorities were actively monitoring tamerlan tsarnaev when he was over there for six months, it's very positive we may never be able to piece together that full six-month timeline. >> right, there might be a lot of unanswered questions for a while. so here's where i think we are now. everyone, like bob, everyone knows that those six months were relevant. what we don't know is was it, you know, just a time period in which you became a radical, more disenfranchised and came back here and planned an attack. or was he working with others who helped them figure out how to do the attack, some international group, and then came here and did it on his own. both are scary. there's no question both are scary. but they have different solutions. if there's an international flavor to it, if there's a foreign terrorist organization that's going to require working with the russians, the cia will

involve diplomatic efforts. if it's domestic, if it's two guys who grew up here, grew up my my town, that's a very different feel for the citizens in america. how did they become so disinfected? how did they learn to do this? were there moments in their life where authorities or others could have stepped in. >> different national security implications. >> that's right. the story is unfolding in realtime. so i'm, you know, i think waiting it out between those two story lines. but that's exactly right. if you find out it's a foreign terrorist organize sairgs, all sorts of other issues come into play in terms of what tools we can use to stop it. >> and, bobl,, i just find it interesting on the reading i'm starting to do on the radicalization of others who are trying to commit terrorist activity is how family dynamics do play a role in this. whether it's some sort of precipitating event that starts somebody on a path toward rejecting their parents and kind of moving -- even rejecting the mosque that they go into and

kind of go to a more extreme form of whatever the religion is that they're pursuing. >> anderson, i interviewed a young kid that went to his mother to seek permission to blow himself up in london. and she took fright and went to the police and stopped it. but that's the kind of dynamic we're dealing with is parental approval or influence. yes, you're right. >> interesting. bob baer. thank you very much. coming up, the chairman, as i mentioned, the chairman of the house sbel jenintelligence comm says he stopped answering questions. also, ahead, i'll speak with one of heroes. an off-duty firefighter and paramedic who helped save a 7-year-old girl's life on that terrible day in the boston bombings.

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c chl. the chairman has sent a letter asking for more information about the timing of the first court appearance, which happened monday at his hospital bedside. federal agents had been questioning him without reading him his miranda rights under exception to the rule eminent public safety threat. on "the situation room." he's concerned about why that process was stopped and he wants more information. >> he's arrested friday night. the magistrate, the judge, intervenes into what is a legal activity, the interview that was deemed so by a u.s. court decision, and that is the public safety exception to mirandizing so you have to think about it.

he's going through, he's obviously seriously wounded, he's losing a lot of blood, he has to get the medical attention as early on in that weekend, the judge calls out and says i'm going to show up for this particular event. that is highly unusual. >> so the question is what could this mean for the case against the suspect. joining me now is cnn senior legal analyst jeffrey toobin and criminal defense attorney, mark geragos. jeffrey, what do you make of congressman rogers suggesting that tsarnaev, that he received his miranda rights too soon? should mirandizing him have been held off for more questioning? >> you know, anderson, we have one legal system in this country and it was a good enough legal system to convict timothy mcveigh and charles manson and moussaoui. it will be good enough to convict dzhokhar tsarnaev. i'm mispronouncing his name but you get the idea. the idea that he thinks you have to create this whole new exception just for him is absurd. he was treated the appropriate

way. he was questioned to see if there was any imminent threat to anyone out there in the world right now, and then he was given his miranda rights. that's normal. that's appropriate. there's no reason to think it should have been done any other way. >> but jeff, the congressman is suggesting that since he was mirandized, he has not cooperated with authorities. now, that is in fact the case the most important information he gave was before he was mirandized, none of that is admissible in court, correct? >> not necessarily. under the public safety exception, the court will weigh whether that statement was voluntary, and that's a complex inquiry and i don't know how it will turn out. but yes, it may be true that he stopped cooperating after he got his miranda rights but you know what, this is the united states of america. we don't force people to talk if they don't want to talk. they have certain constitutional rights. he's an american citizen, he was arrested within the united states, and if he doesn't want to talk, we're not going to waterboard him, we're not going to torture him.

we're just going to prove our case some other way, and there certainly seems to be an abundance of evidence to prove the case that this guy is guilty, so i don't see what the problem is here. >> mark, as a defense attorney, what do you make of -- i mean, it's got to be an uphill battle for the public defenders who are assigned to tsarnaev's case. how would you even go about defending someone like this with all the apparent physical evidence, the photographic evidence and the like? >> look, i've got to echo first what jeff just said. this is -- the idea that this congressman is on the intelligence committee and displaying such a lack of intelligence is mind-boggling. this is an american citizen on american soil committing crimes allegedly against other americans. you know, take a look at the results in guantanamo. they haven't exactly been spectacular for the prosecution in the results that they've had.

and take a look at the district court and the results they get where people go away forever or get the death penalty and it's very quick. you get appointed a public defender and as you just said, anderson, this seems like an uphill battle, yes, because they have a mountain of evidence. now, what is the miranda rights and what does reading the miranda rights really mean? it means that if you don't do it, then what is said may or may not be admissible. well, they don't need that. they don't need that to convict him. and i will tell you something else. the lawyer who represents him, mind you, it's going to be a public defender. the public defender is going to try and save his life. this is going to be a mitigation style case. this isn't going to be somebody,

unless this is richard jewell redux who is saying you got the wrong guy, the way they'll try to do that is trade information so they take death penalty off of the table. that's what's going to happen. this kid is 19. there are some mitigating factors. was he under the influence of his brother and by the way, as an armenian, i do want to comment that all of this speculation about some recent convert named misha which by the way is not an armenian name is insulting to armenians everywhere who by the way is the first christian nation, so rather than have some uncle on who passes for somebody who knows what he's talking about who hasn't seen this guy in three years, i think we should be a little bit more critical of some of the information that's being passed around as gospel at this point. >> right. and wolf, actually in the interview with the uncle, did come out that that uncle has not seen these kids or kids, these adults, these young men, as you said, in two to three years. >> in two to three years. >> how he knows -- >> right. and all of a sudden, he's all of a sudden insulting armenians everywhere as if there's some armenian convert to muslim. remember, the armenians and this week, the armenians celebrated the commemoration of the genocide where 1.5 million christian armenians were wiped out by muslim ottoman turks so the idea there's some convert who doesn't even have an armenian name is ludicrous to begin with. someone needs to give this uncle

a field sobriety test. i think this guy was under the influence of something. >> misha is a nickname for mikhail. jeff, the prosecution doesn't need a confession in this case. they don't need to prove intent, do they? >> there are so many ways that they can prove guilt here that we have spent so much time understandably talking about miranda and whether his statements can be used against him, but it may be simply irrelevant. the prosecution may simply decide we don't need to litigate whether this statement was admissible -- >> exactly. >> look at the evidence in this case. look at the photographs from the scene. look at how he behaved afterward. look at his apparent confession

to the car, the driver of the car they hijacked. they have all this evidence that is completely admissible without any question, so you know, yes, it was understandable that given that this was a terrorist act, they wanted to find out immediately if there was something more, but once they found out there was nothing more, there was no reason to continue the interrogation. >> i got to go. we're way over time. mark geragos, appreciate you being on. jeff toobin as well. ahead, you'll meet a firefighter paramedic who is just a remarkable guy. he saved the life of a 7-year-old girl who is badly injured. could have easily died in the wake of the bombing. matt patterson is his name. he only recently got his paramedic certification. he was in the right place at a bad time and knew exactly what to do. >> i get up, i run back to the sidewalk. there happens to be a gentleman standing there. just couldn't tell you who he was, spectator.

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we have been focusing a lot on the two suspects in all of this. we never want to lose sight of

the most important people here. the victims of this, the people who are right now facing the loss of a limb, who trying to rebuild their lives and also tell you the stories of the heroes who rose that day, who ran toward what many were running from. we talked to s.w.a.t. team members, first responders, firefighters. today i had a chance to speak to another one of those heroes, a firefighter paramedic named matt patterson. he was off duty the day of the attack, near the finish line near where the first explosion was. he was in a bar with his girlfriend when he heard the blast. he ran into the street, he immediately saw a child he would later learn that it was this little girl, a little girl in this picture, 7-year-old jane richard. her brother is 8-year-old martin richard, standing in front of his father there. martin of course died from his injuries. when matt reached jane, he saw that most of her left leg was gone, gone above the knee. he knew he had to act quickly to save her life. she could easily have bled out in a matter of a minute or so. i talked to him earlier about how he saved this little girl's life. so it's really the second blast when you realized -- >> second blast, yeah. that took all doubts out of my mind. i immediately started running towards the front, yelling for

people to get back, get to the kitchen, get away from the windows, you know, not pushing people back but at the same time, i was making it known that i was going forward and they were going the other way. i get out to the patio and i don't know if it was just tunnel vision or fate or whatever it was, but i just looked and focused and i just saw this one child in the middle of the street just sitting there with this dazed, shocked look. even from where i was, i could tell this child was hurt. >> you could see her face. >> yeah. i could just tell. like i said, that's why i don't know if it was tunnel vision or what, i zoomed in. call it training or intuition or whatever. something was horribly wrong. >> because it's pandemonium. >> it is. it's hard to explain, but it is pandemonium. but once you get something in your mind and once you focus on it, like that's the task at hand. i don't know if it's training or if it's just the fact that i was distracted by just this one child, but it had my full attention. >> so you ran over to this little girl. >> i ran over to this little girl. who initially i thought was a boy. i knelt down, i expressed you

know, hi, i'm matt, i'm here to help you. dad was there, i'm a paramedic, we're going to be all right, we're going to be okay. >> she was with her father? >> with her father and older brother. neither one of them looked injured. i asked her her name. the reply i thought i got back was shane. turns out it was jane. like i said, the answer was irrelevant. the fact that she could speak told me that she had an airway, it was patent and she was conscious and alert to what was going on. she just looked in a state of shock. she just had this emotionless look and i only remember her saying once or twice that her leg hurt. >> so was she crying? >> no. nope. no crying. she looked me straight in the face and answered the question. what's your name. turned out to be jane. but shane. you can imagine with the chaos and the noise, shane, jane. >> right. >> it was just -- >> what did you do first? >> so once she spoke, i realized her air was good, looked down, i realized that she had a full left leg amputation.

so i get up, i run back to the sidewalk. there happens to be a gentleman standing there, couldn't tell you who he was, spectator. i need your belt, i need your belt. no hesitation, this man just ripped off his belt, gave it to me. took the belt, ran back over, applied a tourniquet. i look left, i look right, i know that we need to get this child moving. she was in serious condition. nothing was going to save her life at this point besides surgery. >> it was critical to get the tourniquet on to stop bleeding. >> yes. the tourniquet was crucial. without the tourniquet, she would have bled out. >> how quickly could she bleed out? >> depends on the size. if the wound cauterizes or it's an artery, 30 seconds. >> you got the belt, you ran back. >> after the tourniquet was applied, another gentleman who i later found out michael chase, great guy, ran up to me, asked me what he could do. i said listen, we have to move this kid. i said this child needs transportation and you know, medical help like real medical help, like a doctor. i heard the familiar sound of

sirens which is good. looked up and down boylston street and i saw two fire engines and a medic truck coming towards us. immediately scooped up the child, told michael no matter what, don't let go of the tourniquet. we ran in unison down the street i guess with the father and the son following. didn't notice michael ended up staying and talking to them afterwards to calm them down. >> you're running holding jane and michael -- >> is running with me holding the tourniquet on. just to keep it cinched down because it's a belt, it's not made -- it's not designed for that kind of pressure and that kind of tension. so yeah, he had to run with me. his job was to hold the tourniquet and i was just supporting her weight while he held that on. it was crucial. like without him or i, it wouldn't have worked. it couldn't have been done with one person. you can't. you needed -- both of us had to be there at that time and able to do what we did. i ran back to the scene. i get upon another child who i noticed that cpr's in progress. i don't know who was doing it but i did notice that cpr was being done. got up to the child, i notice it's a boy. could have been between 8 and 10 years old, small little child, severe injuries as well, lower extremities and abdominal.

so i moved my way to the head. at this time, there is some medical personnel on scene so there's a first in bag, an emt or basic bag, and i administered two breaths to the child, let the cpr go, two breaths to the child, checked for a pulse, there was no pulse. i knew at that point that it's never a lost cause with a child or anything like that, but the situation depending and especially that situation with the amount of injured we have and the severity of the injuries, that there was nothing that -- there was nothing more that we could do for this boy. >> that was martin richard. >> that was martin richard. i was like that's the boy we tried to save and ended up just having to triage and move on to someone else that could be saved. >> that was jane's brother. >> that was jane's brother. yeah. >> what's that like, i mean, you're with these people in the most horrible moment in this

intimate moment and to not even know who they are, then to see on television the picture of this little boy when he was alive. >> during the event and the tragedy, you know, you don't really have a connection and it's not personal. i don't make it to sound like we don't care, because we do. but it's a very -- >> you've got to be focused. >> it's very methodical, this is what we have to do, this is who we can save. you have to assess each injury and each victim separately without bias and it's purely based on what can i do to save this person's life or help, and can it be saved. >> have you been able to talk to the family? is that something you ultimately would like to do? >> ultimately, it's up to the family. that family has suffered more in a day than anybody should in a lifetime. i would like an update.

i would like to know that we did make a difference and it's one less person that they didn't get, one less life that wasn't robbed. >> you saved a life. >> yeah. that's ultimately what it's about. you just happen to be in a really bad situation but you were there, you were put there for a reason and you had the knowledge and you know, the guts or whatever you want to call it to run in there and make a difference. >> you just became a medic. >> i did. >> i'm very glad you became a medic. >> me, too. >> thank you. >> hey, thank you very much. appreciate it. >> very glad indeed. a remarkable guy. matt patterson. a lot of hard-working people >> they'll all have to learn to walk with prosthetic limbs. sanjay gupta reports on what that journey is like. heerp's his report. >> it takes time. about six weeks post-surgery for a new amputee to take this first step. >> so one of the most important thing social security that this

wound around the amputation has to heal up completely. and after that is done, they actually have to shape the remaining area of the leg and then actually put something onto sort of shrink those tissues so that the prosthetic can go on. >> every patient that suffers an amputation goes through tailored therapy to learn how to use their new limb. peter culic has had his prosthetic leg less than two weeks. >> the siphons of progress can be small sometimes. but, look, no hands, there, he's using one hand earlier, two hands before that. let me show you something else. come around and take a look. when you actually look spefbl y specifically at what's happening over here, look what's happening with the prosthetic. you get the sort of expect that you want, the heel to toe sort of rock. that's not something that comes naturally.

that's something pete has to practice. >> surprisingly, everyday tasksic like making coffee, is part of therapy, as well. >> he's not holding on right now. he's trusting his leg. he's got a lot of balance that he's testing and successfully testing by actually moving around the kitchen here. he's never done this before. take a look. it's an uneven surface. he's got to, essentially, bend his knees. it's a lot harder than it looks for someone who has a brand new property prosthetic device. >> it's taking those first steps to learn to live independently. >> some people say, look, this is going to be a new normal for these patients. but you say it's actually more just normal. once they. >> once they look back on this situation, a year from now, two

years from now, you know, yes, this will be a nightmare. and, yes, there is a loss that is permanent. but they have every reason to expect that they're going to be able to go on and live the same happy, satisfied lives. >> in fact, most amputees go onto not only live a normal life, but to push themselves, even beyond previous expectations. >> the future is really much brighter than they could probably imagine at this point in time. but the people in boston will have that experience. >> dr. sanjay gupta, cnn reporting. >> i want to take a few moments to thank all the good folks who work at the westin copley hotel that has been our home base. it's a terrific town and they've done a really nice job in making our jobs that much easier. we're really deeply appreciative for all of their efforts. coming up tonight, stopping an

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crossed the finish line of the boston marathon, bomb-sniffing dogs swept the area twice according to the "boston globe." the type of bombs used in boston, though, could have been hard to detect but at alabama's auburn university, researchers are training what are being called the ultimate bomb-sniffing dogs. randi kaye went there to report. >> reporter: imagine if the boston bombing suspects had left a trail, a trail of vapors in the air that smelled like a bomb. vapors that only a specially trained dog could detect. >> stay. stay. stay. >> reporter: a dog like these, now being trained at auburn university. researchers here call them vapor wake dogs. the point of a vapor wake dog is to detect the vapor of the bomb before it's placed somewhere before it might explode, catch it before that? >> exactly correct. your standard bomb dog, your explosive detector dog, is primed on looking at an object, a backpack, that's placed somewhere.

a vapor wake dog's ability is to detect the odor coming off of that backpack on the back of someone as they carry it. >> reporter: amazing. >> and to follow that plume of vapor. >> reporter: auburn university professor jim floyd says vapor wake dogs are the ultimate bomb-sniffing dog. they can follow a plume or bomb vapor stretching several football fields. a skill so unique, the university hopes to patent it. this video from the university shows a vapor wake dog in action. once he catches the odor in the air, he never lets up. we did our own experiment at this alabama mall with the help of auburn's canine handlers. they give the man in the red shirt a knapsack loaded with explosives inside a pressure cooker, just like the bombers in boston. watch as the dog catches a whiff. and just like he's trained to

do, when the suspect stops, the dog stops, too. then sits down, alerting his handler to the bad guy. in a crowded mall or on a city street, this technique is crucial. these dogs can potentially stop a would-be bomber before it's too late. you think that if you had a vapor wake dog in boston, they might have detected the suspects before they were able to place those backpacks down? >> had one of our dogs been in place on that corner with those two guys walking there with those backpacks, i think they would have alerted on them. >> reporter: their training starts early, even as early as these puppies which are just about three weeks old. at this time, they're held a lot and socialized and then by the time their formal training starts when they're about a year old, they're used to people and loud noises and they don't get spooked so easily. auburn has its own breeding program for bomb-sniffing dogs. they rarely use shepherds and traditional breeds, but lean

more on labradors and spaniels. paul hammond, whose company i-canine is working with auburn to train and deploy vapor wake dogs explains why. >> we need a dog that fits into the public profile, the public will walk past and ignore as if it's a domestic pet. >> reporter: the dogs are being used in airports, on amtrak trains and by police departments, too. what is it about a dog's nose as compared to ours that they are able to pick up something like that? >> well, the dogs' olfactory system is 220 million scent cells compared to a human's five million scent cells. that gives you a real comparison. where we might be able to smell a woman's perfume walking by, the dog will not only smell the perfume but the clothes, the material she's wearing, the shower gel she washed with that

morning. >> reporter: in addition to vapor wake training, these dogs are also able to detect explosives in the traditional way. paul shows us by hiding explosives in the tire well of this car. >> good job! >> it is a game to the dog. if the dog thought he was looking for explosives he probably wouldn't do it. >> reporter: what may be a game to these dogs could mean the difference between life and death to the rest of us. >> good job! >> reporter: randi kaye, cnn, aniston, alabama. >> yet another reason why dogs are awesome. we'll be right back.

before we go, we want to show you the cover of "boston" magazine just out there. take a look at this. there you see it, a heart made with running shoes. in the middle it says we will finish the race. after being here for nearly two weeks now, having the privilege of seeing the strength of the people here, the determination