, obviously a lot of critical nerves were amputated, were cut. those nerves used to feed muscles i used to have in my lower legs what we want to do in this field of bionics long-term is be able to talk to nerves, both collecting how a person wants to move and sending it out to a bionic device and stimulating into the nerves, into the nervous system so that we can then take sensory information on the bionic limb and reflect it on the nervous system and the dream is that one day they will be able to walk across sand and feel the sand against their synthetic device. i am often asked if i was granted a wish from a magic fairy, would i wish my biological legs back and i say absolutely not. my bionic limbs are part of my creation. they have become part of my identity. what is really fun is they're upgradeable. so every few months i get a hardware and software upgrade and as my biological body ages, my artificial limbs get better and better. so it is interesting that i am kind of getting better and better, at least that part of my body anyway. >> it is

i believe most over amputations -- all of the amputations were above the knee. >> above the knee. >> yes. because essentially the leg was completely destroyed below the knee. as i said in the morning, it wasn't a hard decision to make because we just completed ugly job that the bomb did, and these patients came to us with completely mangled, destroyed extremities, hanging by shreds of muscle and skin, and we had to go through the unfortunate task of completing the amputation. [inaudible] >> we had very little discussion. we had very little discussion with patients before hand. most of these patients were in a state of shock, and at that point we were rushing to save their lives. they were bleeding profusely, and that wasn't the time for talk and that was the time for doing. >> can you say how many teams you have operating through the night? >> shepard: two of the heroes of this tragedy in boston. and think of what they just told us. they said that many of these patients had lost their extremists below the waist. they were in surgery for many hours. six to seven of them are still in c

will require amputation. we're hopeful we have saved all of these limbs. >> doctor, were you surprised by how effectively you've been able to help these people? the people that were so injured and to make sure that there wasn't a larger loss of life, especially when you talk about the lower extremity injuries and the fact, you know, just nicking an artery could cause someone to bleed out. >> yes. surprisingly only three patients succumbed during this event. we're very fortunate in boston that we have several level 1 trauma centers, and the boston ems crews did a fabulous job so that not all of the severely injured patients were taken to one hospital. that makes no sense. so to a certain extent, no one hospital was overloaded. we were able to send five critical patients very soon after arrival to the emergency department up to the operating room. we had five operating teams immediately. we'd obviously stopped elective surgery to prepare for these patients. and that distribution of the severely injured patients

some have ringing in their ears and some are dealing with amputations. at the finish line, 25-year-old kaitlin was standing with her friend leo when is the first bomb hit. bomb blen her into the air and her right leg became severely damaged. leo took his shirt and stopped the bleeding and carried her several blocks to his car where he went down wrong way to massachusetts general hospital where she was admitted. president obama had an inspiring visit to her. fox news was allowed to see her because i'm a physician. >> did you feel any pain? >> i think i was in such a state of shock. i was more concentrated, i definitely think i was going to make it. a good amount of bleeding. i made a phone call to my sister and was more concentrated -- >> i wanted to ask you a question. do you have any medical training or had a good intuition. >> i think i watch too much tv. i don't know. >> no medical training at all. >> how did you know to use a tourniquet? >> i didn't put a tourniquet on her leg. i have some classes and that sort of thing but i didn't want to put a tou

about six weeks postsurgery for a new amputate to take this first step. one of the most important things is that this wound around the amputation has to heal up completely. this incision line over here. and after that's done, they have to shape the remaining area of the leg and then actually autosomething on to sort of shrink the tissues. every patient that's suffering an amputation goes through tailored therapy to learn how to use their new limbs. peter coolidge who lost his leg due to complications of diabetes had his prosthetic leg less than two weeks. signs of progress. one hand. two hands before that. let's show you something else and take a look. when you actually look specifically what's happening with the feet over here, stepping up with the good leg and look what's happening with the prosthetic. you get the sort of expected -- what you want, the heel and toe rock. that's something pete has to practice. surprisingly, every day tasks like making coffee, it's part of therapy, as well. he's not holding on to anything right now and able to keep his ba

at least 14 of the victims had to have amputations. we got word of the transfer from the hospital here in boston to the federal prison detention hospital. the move comes almost a week after he was captured in the manhunt. deborah feyerick is outside the federal facility right now in devens, massachusetts. fill us in on what you've learned about this transfer. >> what we do know is fort devens was put in lockdown yesterday and we got word that dzhokhar tsarnaev was moved here. it's run by the bureau of prisons. they have about 1,000 beds. he was brought here by u.s. marshals, u.s. attorney, fbi, all of them obviously coordinated this to make sure he got here. what's interesting is the fact they moved him. usually -- and i spoke to somebody at the justice department, usually when a prisoner is well enough and they are transported to an official bureau of prisons facility and i'm told that that's what happened in this case. i tried to press to see if there was any suggestion that the hospital wanted him moved rather sooner than later beca

. >> that's the amputations. at least one patient here who had a head injury that required an operation further away from the explosive site. and one patient had shrapnel injury to the neck that actually hit one of the arteries and that needed to be operated right away. those patients are doing okay, my understanding is. that gives you an idea of the nature. >> there were questions over the shrapnel and the nature of the metal and the bb like pieces and the nails and questions whether this came from the environment, right? but it is not. >> i can tell you, as a person who has done trauma surgery, it can be difficult to tell sometimes when you're actually taking some of the shrapnel, wear exactly did it come from. but now they're saying without a doubt, we asked a few times, that there were nails, carpenter nails specifically and, quote, bb-like metal within some of these patients. and so they -- they know for sure it came from the explosive device. this is a doctor saying that based on their medical examination.

she had an above the knee amputation. wasn't with me that day, but she is a friend of mine, so, you know, certainly anxious to talk to her and others who are in the same situation i am. as far as -- i'm sorry, the other part of the question? >> the other part of the question was the folks that came in to talk with you about what their lifestyle was like, how were those conversations? >> i had a couple people talk to me about the fact they were not willing to give up their foot at the point where they had to make the decision i had to make and how they really regretted that decision because it was years of pain and unnecessary sort of suffering for them. so, you know, that kind of helped me with the decision hearing different people sort of support what the doctors here were telling me. most of the people that i've spoken with have had amputations related to motorcycle accidents or some received amputations for incidents that happened in iraq or afghanistan. and, you know, they seem like very positive people. they just say

that i have my leg amputated. it took a few years to come around to that way of thinking. but in the end, that's exactly what i decided to do. it change my life. >> from what i -- it was the pain and discomfort and the immobility from that was just -- was causing havoc in all parts of your life. >> exactly, that's correct, yes. it was one thing to do that, to go ahead with the amputation, but now look at you, you know, you took it to the next level. where did you go from there? >> so about -- not quite four years ago, my wife was training for an ironman triathlon. she suggested i do that. at that time, i was out of shape. after a little bit of prodding, i decided to go along with her. i didn't finish that first ironman. the next year, i came around and finished ironman canada. >> and then with that moved on to the big one. >> yeah. >> what happened? >> i was having a pretty big day. at first, the bike battered me good. by the time i got to the run, it was a walk. conan's a different animal. >> but you kept going.

, you decide to perform that amputation early, meaning this isn't typically something you wait and seein, because the problem is that if an infection occurs and gangrene can occur, that can affect other parts of the body quite readily. so it's an operation that oftentimes, the decision is made quickly and it's a pretty obvious one when doctors see that. again, i'll tell you, we don't see a lot of these type of injuries in the civilian setting in the united states. lot of these doctors and especially the professors at these trauma centers are trained on the battlefield. that's where they saw lots of these injuries and that's where they get their medical triage decision making but it's tough and heartbreaking. >> sanjay, thank you. giving us a feel for the fact that so many people are fighting for their lives. 17 in critical condition right now who are literally fighting to survive. i want to bring john king in, our chief national correspondent, who is from boston. john, you're learning more about the devices being found, the key question. >> let me give you the latest from the law enfor

people have very serious injuries, dismemberments, amputations later at the hospital.l injuries. so much that was done here at the scene, prevented further loss of life. finding out what was going on in the hospital. trying to get the latest on what they get released. good news where we can find it, also the investigation. what's going on here on the ground? latest searches. this is a massive, coordinated effort run by the fbi. the joint terrorism task force. our team coverage, focusing on this as well. national correspondent susan cann candiotti, when you look at this, you have been following it all night. when we look at the intensity. >> it ranks right up there, chris, going back to the 9/11 bombings, going back to the oklahoma city bombing and coming up on that anniversary, this week, as a matter of fact. all of the terrorist investigations bringing in assets as you said from different agencies. >> from the city of boston, the pd, all the federal investigations. and right now we're looking at what is a domestic attack. they just don't know. they are at the beginnin

his name is jeff bauman, an amazing guy, he had both legs amputated after the explosion.his photo has become famous. he's being runned to emergency help by that man, carlos in the cowboy hat and others and he spoke to the "dennis & callahan" morning show on weei in boston about why tsarnaev looked so suspicious to him. listen. >> i was with my girlfriend's roommates and we were having a great time, you know, we were watching the runners, everyone was having a great time. and just that one guy, you know, he didn't look like he was having a good time, so he was right next to me at that point, and he had a bag and he had his glasses. he had kind of like a leather-like sweatshirt type of deal, and you know, it was warm out. he was just an odd guy, he just struck me as odd and that's what i remember of him, and then -- next thing you know, i hear fireworks and i'm on the ground. >> so you actually looked this person in the eyes? he had sunglasses on but you made eye contact with this guy? >> yep. >> and immediately you knew there was something wrong. >> yeah, exactly. like he

amputations for incidents that happened in iraq or afghanistan.hey seem like very positive people. they just say, you know, this is who they are. and i aspire to be like that eventually. >> gentleman at the back? >> you've been through what they would describe as a life altering experience. explain what appears to be your positive attitude and what would be your mention to others? >> you've been through what appears to be a life altering experience. can you explain for us your positive attitude and -- >> mention for others. >> what is your mention for others? >> i think like i said earlier, it is a life altering experience. and if i didn't have the support system in my family and friends that i do, i think i would be devastated. i don't think i would have a positive outlook. but it is so hard for me to focus on anything negative. because they're always around. i have hardly any time to myself to really sit there and dwell on it. if i do find myself, my mind kind of going there, i try to turn it around and say you can't sit there and say what if. w

there were amputations that happened or partial amputations. some are in critical condition at some of the hospitals. there is the possibility that the death toll could increase. the bottom line is, this is going to be a situation that's going to go on for some time. one other point. the doctors said they are asking for donations of blood from the general public. they don't need it now. but they anticipate in the days and weeks ahead, they will because they're running for a lot of blood supplies to deal with the 30 or so patients who were brought here. there's also the mental health component to all this. this was devastating for this city. it was a celebratory day. a day off. a holiday. the boston marathon here is always a very, very special occasion. a very uplifting occasion. i used to live here. and it was a big deal. a lot of people are feeling vulnerable. there's a lot of anxiety. yesterday, there were police everywhere, trying to determine there were bomb threats in different places. today there was is a security presence the heart of th

similar kind of injuries, amputations, that kind of thing. very similar. >> you and tim were committed to presenting such an authentic picture of soldiers on the front lines. we've learned in the aftermath of monday's bombings that, you

every patient that suffers an amputation, those who tailor therapy to use their new limb. peter coolidge who lost his leg due to complications from diabetes has had his prosthetic leg for less than two weeks. >> no hands there. he was using one hand earlier and two hands before that. let me show you something else. come around and take a look. when you actually look specifically what's hapwipening with his feet over here. stepping up with his good leg and look what's happening with his prosthetic. you get the heel to toe sort of rock. that's not something that comes naturally. that's something that pete has to practice. surprisingly everyday tasks like making coffee, part of therapy, as well. >> he's not holding on to anything right now. he's actually able to keep his balance on his own. and he has a lot of balance that he's testing and successfully testing by actually moving around the kitchen here. so, he's never done this before. i mean, take a look. an uneven surface. he's got to essentially bend his knee. a lot harder than it looks for someone who has a brand-new pros

if they were walking before they had their amputation, we can have them walk again. of their amputation, and all of it depends on what their goals and objectives are. >> reporter: and we've seen just how impressive these prosthetics can be. our own diane sawyer interviewed amy mullins, both her legs amputated as a young girl. she later not only competed in the paralympics, but became a model. whether it's dancing or running, the doctors say modern prosthetic technology is so advanced, adrianne will get back on the dance floor. >> i just want people to know that you can come out of a situation that might seem like the end of the world, and come out stronger. >> reporter: this dancer is determined, like the rest of the city, to get back on her feet again. gio benitez, abc news, boston. >> we thank you so much for watching. we're always there at abcnews.com. "nightline" later at its new time, 12:35 a.m. eastern. and i'll see you tomorrow night from dallas, texas, and until then, goodnight. >>> this is the only level one trauma center. tonight is the city equipped to han

doctors said there have been semp amputations. -- several amputations. i was listening with great interest in a couple doctors who had been through a lot and were calm as they can be. but explaining to us that there were many more surgeries that had to be done. i was thinking of what that means and they're saying we had to stop the bleeding, take off the parts no longer useful, seal the body up, and wait to see what we have to do later. that is a horrifying series of circumstances for people not in your field. >> that is what you see in a war zone, iraq, afghanistan. you see a series of operations. you hear from a doctor giving a press conference, his partner worked in the war. they make an assessment. if they have to do an amputation they want to do it right away because there is a big risk of infection. we've seen over 10 amputations but describing if there are shamp nel wounds first you fix the bone then go back in to fix the sharp issue then fix the vascular or arteries in the vain and try to save the leg that can take several days. he said he'd done

many of those people with very serious injuries, amputation injuries. nbc news now hearing from multiple sources that those bombs contained shrapnel and that that is what led to so many of those serious injuries. back to you. >> that was katie davis reporting from boston. thank you, katie. we were getting some updated information about the number of injuries. we understand now 86 people are injured there at five different hospitals and we believe at least two of those are children. still the death number confirmed at two. that hasn't gone any higher. >> these numbers could change throughout the evening. >> yes. >> we'll keep you posted. of course the boston marathon one of the nation's best-known races. it attracts runners from all over the world. >> a group from our area had already crossed the finish line when the blast happened. dan hellie was able to talk with one of them. >> owen graham, a good buddy of mine from high school. the first thing i did when i heard about this was go to his facebook page to make sure he's okay. he's part of the montgomer

by wednesday she had the complete amputation just below the knee. so of course, her mom had to be the one to tell her the bad news. yeah. >> can you -- i don't want to make you relive this, but can you tell me how that conversation went? >> when she called us, it was about 1:00 seattle time. get on the first plane. we were hit by a bomb. she said my foot is gone. i don't know what i'm going to do. just get on the next plane, which is what we did. when we arrived by her bedside at 8 a.m., she had already been in emergency surgery. they didn't go in until wednesday to make sure it was clean and do the amputation. >> it is done at the knee? >> just four to five inches below the knee. >> that's wonderful compared to what it could have been. that's a huge advantage. when she woke up, did she realize that much has been taken? >> when she first woke up on tuesday, i know she mentally knew her foot wasn't there. by the time the surgeons, who are absolutely fabulous, came and spoke with her she knew an amputation was likely and was willing to face all the fu

doctors said there have been semp amputations. -- several amputations. was listening with great interest in a couple doctors who had been through a lot and were calm as they can be. but explaining to us that there were many more surgeries that had to be done. i was thinking of what that means and they're saying we had to stop the bleeding, take off the parts no longer useful, seal the body up, and wait to see what we have to do later. that is a horrifying series of circumstances for people not in your field. >> that is what you see in a war zone, iraq, afghanistan. you see a series of operations. you hear from a doctor giving a press conference, his partner worked in the war. they make an assessment. if they have to do an amputation they want to do it right away because there is a big risk of infection. we've seen over 10 amputations but describing if there are shamp nel wounds first you fix the bone then go back in to fix the sharp issue then fix the vascular or arteries in the vain and try to save the leg that can take several days. he said he'd done s

ten amputations, deb feyerick reports, leg amputations and ball bearings among the shrapnel being removed from the victims. a very fluid situation. we should note that often in the early hours after such a tragedy, you get conflicting information or you get information that later turns out not to be true. but the headline at this hour, that bolo, be on the lookout issued by law enforcement officials for a dark skinned or black man that officials say appear to be trying to get entry into a restricted area just before that first explosion. >> of course, at this point, there was a ground stop at logan airport. we were flying in earlier today, flights from new york were shut down for a time, then the airport opened again. so obviously, they are being very cautious all throughout the city and really all throughout the country now, various states of alert in various regions, including new york city. officials saying they are in a heightened state of alert there, being very cautious at airports and other points of interest. are you hearing anything from officials in terms of the number of people

of course they've had to do amputations. never before have they seen the quantity or the rush into their e.r. that they had to see last night. describing the sh represent nal that they had to remove from the limbs. often it's been the lower extremities where most of the injury has occurred because of the ied-like devices that exploded. that's what they're dealing with currently at this hour at this hospital and at hospitals across boston. >> all right, poppy, thanks. please keep us updated there. a lot of people still fighting for their lives. and we have to follow them and make sure they make it through. thoughts and prayers with people this morning. you spent as much time in iraq as anybody as i know when we were working together at abc. these types of bombs, these explosions knocking limbs off. very common there and a little bit of a window into what they're looking at in the investigation. >> that's right. speaking to someone who was right at the scene of the explosion last night. someone with experience in law enforceme

doctors said there have been semp amputations. -- several amputations. i was listening with great interest in a couple doctors who had been through a lot and were calm as they can be. but explaining to us that there were many more surgeries that had to be done. i was thinking of what that means and they're saying we had to stop the bleeding, take off the parts no longer useful, seal the body up, and wait to see what we have to do later. that is a horrifying series of circumstances for people not in your field. >> that is what you see in a war zone, iraq, afghanistan. you see a series of operations. you hear from a doctor giving a press conference, his partner worked in the war. they make an assessment. if they have to do an amputation they want to do it right away because there is a big risk of infection. we've seen over 10 amputations but describing if there are shamp nel wounds first you fix the bone then go back in to fix the sharp issue then fix the vascular or arteries in the vain and try to save the leg that can take several days. he said he'd done

at least a dozen have had to go through amputations. doctors say most of them are making very, very good progress. >> nearly all of the patients that have lost legs are already walking halls with physical therapists. it takes a lot of work. it takes a lot of safety, a lot of practice. and they have to learn new routines. but we're all gearing up for a mass exodus to rehab hopefully during this upcoming week. we're all looking forward to that. >> also boston police say the transit officer who was gravely wounded in the fire fight with the suspect says he's improving. they're very optimistic about his recovery. piece of good news for you there. with one suspect dead, it's hard to put all the pieces together. for investigators his wife is talking through her attorney. this hour you'll hear what she has to say about her husband. then while the investigation continues, boston is getting back to business. this is our special coverage the boston bombings. we'll be right back. we got a su. it's where she said her first word. (little girl) no! s

we heard some injuries were so serious they are resulting in limb amputations. what can you tell us about the range of injuries. >> reporter: there are about 30 people roughly who were taken to various hospitals across boston in very serious condition. here at mass general doctors said there were eight people who were in critical condition and were still undergoing surgery and will begin under going multiple surgeries before their conditions can be ascertained. there's a lot of people here with horrific injuries and still unclear whether they will make it or not. the death toll could increase but at this point it's still at three. another problem here, all the patients who were brought in have not necessarily been identified. some were unconscious. families were separated. some were taken to this hospital, some to others. earlier in the day there were relatives trying to find their loved ones. that situation will be resolved today. >> ron allen live at mass general in boston. later on we'll provide a way for people to find loved ones. >>> people at the scene of

we know at least 10 amputations have happened already. explosions within seconds of each other along the marathon route. >> and first sound like a cannon blasts it almost blew my head off. we will get to the bottom of this and we will find out who did this and why they did this. any responsible individuals. any responsible groups will fill the full weight of justice >> the force of explosions caused a billing cloud of smoke over, we square and rising panic >> everyone started to scramble. there were pushing people to get away from the scene not knowing if there were more explosions, >> we are looking for any information people have or may have sought or might have heard at the side of the explosion or have in the coming foregoing. we're investigating all these runoff >> top stories have set up a tip line and asking people to go home or two hotels and to avoid large crowds. >> people should be called but they should understand that this is an ongoing events >> the marathon winners had wrapped up their races an hour earlier but nearly 27,00

a lot of people amputated. at least 25 to 30 people have at least one leg missing or an ankle missing or two legs missing, including a boston police officer who was wheeled from the course with a leg injury. so even, the police, that were there to protect the scene, were also hit by what appears to be two bombs, adam. adam: we point out if you have loved ones and friends in that area, if you're trying to call them the cell phone service is out in boston because it is being inundated with people trying to call in. wendell goler was talking about this, also rich edson, the president was briefed at 3:00 p.m. shortly after the explosion by an aide from homeland security. nobody has claimed responsibility for this. the video that fox 25 our affiliate has seen or has shown actually shows the first explosion's aftermath. then you see further down the street a second explosion if this was something planned. liz: we want to let you know that at 4:30 p.m. eastern time boston mayor tom men mean mow -- menino will have a n

flew back, they treated 23 patients, five of whom required amputations, two of whom needed a double amputation recovery is happening. one of the two in critical condition is a 5-year-old boy. chris, john. >> elizabeth cohen, thank you. the doctor won't be satisfied until all of the patients are home. thank you so much. >> terrible as the injuries are, those are the lucky ones. three people lost their lives. it's not just about how they died, but who they were. we have been captivated by the 8-year-old boy, but now we hear about 29-year-old krystle campbell. worked hard, lover loved by her friends, we sat down with her grandma. she told us as much as it hurts, she knows that her favorite grandchild is now an angel. take a look and listen. what do you think when you see this photo. >> beauty. >> what was she like in high school? >> smiling all the time. all the time she smiled. no matter what happened, she come out with a smile. i used to love to dress her up. put her hair in long curls, and bows in her hair. loves it, go out prancing, proud as anything to school. and then in school, the teacher

she says she was given a choice to amputate. here is the question.omeone choose to amputate if it wasn't absolutely necessary? >> well, it is a tough decision, wolf. as you point out there are some situations where it is going to be very obviously necessary and sometimes where there are injuries to the where it won't require amputation and it sometimes falls in between. the scenario is typically like this, a specific injury to the leg. doctors will go ahead and stabilize the bones, reconnect blood vessels, even address some of the nerve injury. the question is after that what kind of shape is the leg to be be. the leg, the ankle, the foot, and also the issue of pain. despite all those operations, the leg may not -- it may be, first of all, a great source of pain and just not work. she even said the legs, because of the different lengths, there was concern about that. i want you to listen, wolf, to how her doctor put this particular decision. >> it's very, very rare that the doctor makes a decision. we do everything to let the patient come to their ow

unfortunately because of the devastating attacks of bombs there were amputations. >> the sharp objects found in the body this bomb had multiple metallic fragments in them. we removed pellets and nails. we have performed four amputations and there are two more limbs at risk. >> the dead boy was martin richards and mother and sister suffered serious injuries. well known in odor chester, a working class of boston. his father is a community leader. >> i said -- oh, my god, bill, are you okay. he didn't answer me. my friend told me what happened. i was just in shock and horrified. he just told me that martin had died and other ones were in the hospital. i didn't ask any more questions. i didn't feel it appropriate. it's very sad. there are no words to describe this whole situation. >> bill: it is impossible to put things like this into context. terrorists are obviously targeting america. so far u.s. authorities have done an excellent job in protecting us but it was inevitable that someone would get through. now about the bombs. fox news is reporting they were homemade, put into a knapsack a

. >> did you perform any amputations? >> yes, several. >> how? >> i can't tell you the total. >> can you tell us how many patients you've personally treated? have any of them been able to communicate with you what they saw, what they witnessed, what they went through? >> a number of patients have been able to talk. most of them, we kept it business only, to be honest. so in terms of just what affects their clinical condition precisely. so you probably know more than i do about what happened at the scene at this point. you had another question. >> how many have you been able to treat? >> the hospital has treated 29. i have operated on 6 so far today. >> five patients were unidentified earlier. have you identified all of the patients? >> i don't know. i know some of them that came in have now been identified. >> there have been a lot of questions, doctor, about family members trying to reach their loved ones. have you had any indication from the patients that they've been able to reach their family members and been able to find them? >> some of the

a lot of people facing partial amputations or total amputations of arms and legs. as you might expect where there's a situation where a bomb goes off, a lot of shrapnel and moving around and flying around at a violent pace, and that's the kind of injury they're seeing that's causing the most life-threatening injuries. he said that there are also -- i asked him about what kind of shrapnel, he said it looked like -- he's not an expert, something of an expert, bb gun pell lets. it wasn't the kind that was glass and other kinds of debris that you would a bomb exploding in the city street. exactly. he describes something like a bb pellet, which is something, the investigation will determine this as we go on, something that might have been packed into an explosive. that's one thing the police and investigates are trying determine, what they were made of. but that doctor mentioned that which i thought was interesting. a lot of tension here in the city. i just flew in and drove through the city, i know boston well, i used to live here, it's eerie where people are walking a

. >> how many amputations have you performed and how many more are planned? >> at this point if i have my numbers right, we have performed four amputations and there are two more limb that is are at risk but i hope that we'll save those legs. >> are they in what you would call critical condition or stable? are they in intensive care? >> yes, they are in the intensive care. they're in critical condition. but at this point, we have stabilize their vital signs and hemodynamic situation is under control. >> what are the injuries? can you describe what's placed them in critical condition? >> lower extremity, major injuries. and from these injuries, they bled a lot. we control the bleeding rather rapidly but certainly they lost a lot of blood and caused physiological problems. >> do you have foreign nationals? can you give us an idea about the nationality of the people you are treating? >> as far as i know all of them are americans. >> can you tell us an age range, doctor? >> the younger patient so far was 28 years old and the older patient was 71 years old. >> we

have seen people in the videotape and in the photographs who have apparently suffered traumatic amputation of their limbs boston police said two are dead but as jon lapook report misdemeanor are in critical condition at boston's best hospitals. bob orr is in washington. he has been talking to his sources in law enforcement in boston. can you bring us up to date on what you've been able to learn. >> scott, we were told there were two device devices that did explode. they had been put in trash cans or garbage containers here in the race route. an area congested with people. if you were targeting a crowd it's the kind of place you could secretly drop a bag care ago device and do bit a bit of damage. we were told that one of the devices that was found that had not exploded is intact that will help decode what was put together but we believe there may have been two unexploded devices that were recovered. there's a little confusion about the police spokesman said -- the police commissioner said at j.f.k. library. we were told a while ago this may have been more like a molotov cocktail, like an i

one of the most important things is that this wound around the amputation has to heal up completely, this incision line that you see over here. and after that is done, they actually have to shape the remaining area of the leg and then actually put something on to 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 kulick, who lost his legedu to complications from diabetes, has had his prosthetic leg less than two weeks. the signs of progress can be small sometimes, but look, no hands. he was using one hand earlier, two hands before that. let me show you something else. if you come around, take a look. when you actually look specifically at what's happening with the speed over here, he's stepping up with his good leg over here, but look what's happening with the prosthetic. you get the sort of expected, what you want, the heel-to-toe sort of rock. that doesn't come naturally. that's something pete really has to practice. surprisingly, everyday tasks, like making