me start with you. do you believe this was suicide or murder? i believe it was murder. you don't know only just one of your. homie. i can't go with. what to say. done. we're following the breaking news important breaking news out of boston. a pair of bombings rocked the finish line at the

historic boston marathon. i had been kind of catapulted through the open doors inside, it was just full chaos at that point. first responders rushing over not knowing if the third or fourth or fifth bomb was getting ready to go off. umar thinking i could die here clearly an attack . we don't know who is responsible for this. but we have now concluded this is a terrorist attack. hello and welcome to how it really happened. i'm hill, harper. every year on patriots day revelers from all over the world take to the streets of boston for the marathon. but in 2013, this iconic event was brought to a shocking end. 2 49 pm two brothers unleashed a horrendous, unforgivable attack on the unsuspecting crowds near the finish line. twin bombs were ignited instantly. hundreds of

people were brutally injured in three killed, federal and local investigators teamed up to track down the perpetrators of this appalling act and in less than five days using state of the art text, some old fashioned police work and a little luck. they were somehow able to it all seems far fetched even for the plot of a hollywood film. but it's all true. here's how it really happened. marathon monday in 2013 started perfectly it was a beautiful day. by mid afternoon, the excitement of the elite runners was over, and the people who are running the marathon at that point are people who are running for charities. they have a lot of supporters there they were probably six or seven people deep beyond the barriers. people

out there rooting on their friends and neighbors and family. they were all they ever see someone crossing the finish line. that day felt like any other day. jeff bowman was at the marathon that day with several of his friends. jeff remembers getting bumped into by a guy who wasn't having a good time who wasn't smiling. he was right next to me. you know at that point, and he had a bag and he had his glasses. it is struck me odd. all of a sudden, probably. 50 ft away. the marathon sports. there was an explosion burst that shot up and out. it was absolutely thunderous. that exact moment. i was on the finish line on boylston street, and i had my cameras rolling. immediately you

knew something was very wrong. in just a second. everything changes. jeff baumann is lying on boylston street, feeling himself bleed out. he thinks to himself. okay, this is where it's gonna end. i saw a runner had fallen on the ground. i was confused. i didn't know what was happening. i turned to the only colleague of mine who was still on the photo bridge. and i said, what do we do? and he looked at me and said, i don't know i looked down the street and at that moment the second bomb went off. the second bomb went off 12. seconds later about 550 ft down boylston street in front of a restaurant called the forum restaurant. we're right by the first explosion. when that

second explosion happened. it seemed like it was just right there. there was a blue hazy smoke that just hung over the area. once it cleared, you could see right down onto the sidewalk. it just revealed the horror. krystal campbell. was from medford, massachusetts. local girl who grew up in the area, fun loving she was with her best friend right at the finish line. no i saw her through my viewfinder. she had her arm hugging her friend. and . a few minutes later she was dead. there was a mass panic obviously. people start scaling the barricades trying to tip them over. at that point, my

mind just calculated everything coming together. had an attack. reign of the fence looked over the side and all you saw were bodies. 30 ft cross of just carnage. in the middle of all of this. i remember seeing a little boy and he was sitting up and he's just staring up kind of in our direction he thought. wow. this isn't real. then it was just four chaos. at that point, people trying to pull the barriers back. trying to assess what happened how many people were dead? how many people were injured? my god. the people closest to the explosions suffered the most significant injuries. remember seeing carlos

run across boylston street. i managed to jump the fence holding my flag. and one hand in my camera. on the other hand, the first person he came across with jeffrey baumann. he was very much away. it was very pale , but he was bleeding on his leg. that will forever be frozen in my mind. because his eyes were open. and i couldn't believe that someone who was so gravely injured. could be conscious carlos staying with him got him loaded into a wheelchair and then accompanied him to the transport that brought jeff to the hospital. and i told him to hold on. hold on. carlos picked me up and threw me into the wheelchair. and then i then i was, like, all right, maybe i am going to make it ends up, losing both of his

legs below the knee, one of the most iconic images from that day is that picture of jeff bowman in the wheelchair, and carlos erin dondo, the man with a cowboy hat. but at the beginning , there was some suspicion about carlos being there so quick and whether he was involved with what had happened, he said his cell phone was confiscated by the fbi. authorities question him right away, and it obviously became apparent pretty quickly that carlos had nothing to do with it. he became known as a man of the cowboy hat and became very representative of the city and everything that is good and kind, but it goes to show how chaotic things were in the aftermath of the bombing. that someone so good, so kind could be considered a suspect. it was a tradition for my friends and i go every year. at 2 49. i had just walked over to the forum

restaurant. immediately heard an explosion. and kind of remember us all looking in the direction of it, and before there was a chance to react, the second explosion occurred. the next thing i knew i was on the ground inside of form restaurant they had been, you know, kind of catapulted through the open doors inside, and i remember when i kind of came to seeing a lot of glass and blood on the ground and smoke in the air, and it was difficult to hear. i remember seeing people running towards the back. exit the building, but my foot was in tremendous pain, and i knew i couldn't get up and run. yeah. very promptly enforcement, first responders and ordinary citizens rushed in to help. you know what

one thing that impressed me over and over again and in the immediate aftermath of the bombings was the extent to which absolute strangers stepped up to help strangers. help from the medical. many people up here from the medical tent men and women whipping off their belts and turning them into makeshift tourniquets. i remember the manager of marathon sports where the first bomb went off in his window shattered. grabbing things off of his shelves to turn into makeshift tourniquets to save people's lives. first responders rushing over not knowing if a third or fourth or fifth bomb was getting ready to go off. caution might be possible additional devices. sydney and celeste corporan are mother and daughter who were at the marathon as well near the finish line when the bomb

exploded. i remember seeing celeste corcoran laying on the ground. her husband, kevin corcoran, put a belt around her leg. and then he got another belt from an on looker and put around her other leg. trend daughter sydney was probably 20 ft, away from her laying on the ground. she was being held by two men who were applying attorney to her leg and putting pressure on it. she remembered one man putting his head next to her as a stranger. and saying we're going to be fine. you're gonna be fine. down the street at the forum. heather abbott was also helped by complete strangers. remember thinking i you know, i could die here and i started to call out for help. as people ran by me. i thought, you know who's going to stop. i was very lucky that a woman named aaron chatham stopped and when she saw my foot, she realized she wasn't going to be able to

do on her own, and she went to get her husband. it didn't take long at all. before match. adam came and picked me up. match adam is a former new england patriots football player. i remember as matt was carrying me looking behind us and seeing a trail of blood, follow us and knowing that it was coming from me. question became, who did this with a local where they from somewhere else. at this point in time, there are no official suspects, always a race to try to get those folks before they can get away. stupid. interesting piece. let me bring in my expert. mm so many scratches. those are from my car keys. such a rich history. this won't do well at auction, but at a t and t it's worth a brand new samsung galaxy s 23 weight. really what about this deal is

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the free book and receive so much more call 1 808 31 37 100. we have some breaking news. let's get down to boston. apparently there's been an explosion at the boston marathon . i am told one of our producers matt ferrucci, is there on the ground talking to us by phone. what can you tell us? matt was about 15 20 minutes ago near the finish line on boylston avenue here in boston when i heard two explosions rebecca gregory was near the finish line with her little son, noah. remember that i was thrown back and i could only lift my head and i was frantically trying to figure out what was going on. it looked like something out of a horror movie. and i just thought this this is it. i'm gonna die. i'm gonna die right here on this pavement. i was trying to figure

out where noah was, but i couldn't really verbalize that i was just screaming and in pain. i had never felt pain like that in my entire life, right? said a prayer in my head. this is it for me. take me. but let me know that noah's okay. with my ear drums being blown out. i shouldn't have been able to hear my little boy but i very clearly heard him screaming. mommy mommy , mommy and i looked to the right of me. and noah was in the arms of a police officer. no one knew who each other were with that day, and so no and i were taken to two completely separate hospitals. later i saw that there was a photo taken of noah . i could just see the pain in my little boy's eyes and just the confusion on what was happening. a gentleman came up and tied a tourniquet on my leg

. i remember just begging people in the ambulance put me out of my misery because i can't handle this. i knew my life would never be the same. this time we have all the victims. i gotta commend all the first responders. i think within 20 minutes that whole scene was clear. 264 people were raised by any means necessary to the hospital. of those 264 injured, 17 became amputees and a few lost both their legs like celeste corcoran and jeff baumann. i thought there would have been a lot more fatalities, to be honest with you. as we've been telling you, there are three people dead in these twin bombings at the boston marathon, such an iconic day in this city. you can ask for a better dog. i can't believe this is happening. in addition to the terrible loss of crystal campbell, the two other people killed that day were

lindsay lou and martin richard lingzi. lu was a graduate student at boston university. her and her friend were actually going to the apple store to get a piece of gear that she needed. they were walking by the bomb site when the bomb detonated. and martin richard. such a shame . martin richard was just a young boy who was at the event with his family just happened to be up on the gate, routing people on. unfortunately when that second bomb went off the other day. i came across some photos from a neighborhood party. he was wearing a smile that collide at fenway park. these could be your best friends who could be your neighbors victims. these are these are real people. these are bostonians. it was shattering. i took a person as a marathon as a resident of the city of boston and as a boston policeman to

blow up our marathon to blow up our city that got personal for a lot of us. marathon runners are just going to head out to the comments. okay. marathon done. we're following the breaking news important breaking news out of boston. a pair of bombings rocked the finish line at the historic boston marathon. both explosions are captured on video and somewhere in this crowd of race day, onlookers is the person responsible. investigators just had to find them clearly an attack no one yet has claimed responsibility. we don't know who is responsible for this, but clearly we have now concluded this is a terrorist attack. i think. what the experts could immediately tell about this attack was it was meant to hurt people. then the question became, who did this? at this point in time? there are no official suspects local. were they from somewhere else? nobody knew nobody had any idea. why would anybody go home innocent people. this was an act

of war against the city of boston in the nation really get who did this? in any of these attacks every second every hour . every day goes by, you get a little bit further behind the perpetrators, so there's always a race to try to get those folks before they can get away. president obama called governor patrick immediately and said you have our full support. we still do not know. who did this or why but make no mistake. we will get to the bottom of this. any responsible individuals will feel the full weight. of justice. the process of collecting evidence began immediately at this time. we are looking for the public's cooperation. it was clear that they believed that video and photos held the key to identifying the suspects. verizon you can now get a

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for imprint dot com. you can come out now i'm on it. four imprint for certain presents a max original heaven's gate tomorrow at 10 on cnn. my mom tells me this story about how when she walked into the icu room that the doctor said i was in she came back, and she begged . the doctor said. you have to take me to my daughter because she's not in this room. my own mother. my own mom didn't recognize who i was. we've had a horrific attack here in in

boston this afternoon. the city was very much emotionally bruised in the days following the bombing. no other time in the city. can i remember? people were afraid? asking that everyone be on a state of heightened vigilance. what's going on here? they had no idea who they were looking for a part of a cell was pretty terrifying time to be honest with you. we only working diligently to gather information and gather all the facts and bring those who are responsible for this crime to justice as swiftly as possible. there were thousands of people on boylston street alone. where do you start? the process of collecting evidence began immediately. there were three big categories of evidence . phone records, forensics and videos and photos. we knew that

the universe of people who likely did this work carrying a cell phone. it was also possible that they used the cell phones to coordinate with each other. so we acquired the phone records for all of the phones that were bouncing off of the towers that were closest to the sites. of those two blasts. by collecting that data. you can then compare it to phone numbers of known extremists or people who are currently under investigation. so we did that right away. next forensically, you look to the crime scene itself to reveal evidence that can somehow trace you back to the identities of the people who have placed those devices. we are in the process of securing in, um, processing the most complex crime scene that we've dealt with in the history of our department. it was an enormous crime scene. there was evidence everywhere. evidence was blown on top of cars on top of window sills. i

remember that evidence was found on the sixth floor of a nearby hotel. there were blood samples, glass samples. so much evidence on the scene took over black falcon pier, which is the main warehouse and loading dock on the waterfront black falcon terminal evidence processing center was the size of two football fields. they built a massive grid, and they put all the evidence on that grid to show where it was actually found, essentially reconstructing the crime scene. they had the perfect space to be able to recreate it because of the size of the space. and then for the pieces of evidence that required more detailed analysis . they loaded it on a plane twice a day that flew back to our lab in quantico, so that cycle continued hour after hour. as we chipped our way through that crime scene. the nature of

the plume smoke indicated it was some kind of low explosive type of powder things that would be suggestive of a and i e. d. our lab went to work at basically putting it back together looking at the components of the bomb. what actually housed the explosive investigation has yielded major new clues. sources now say the explosive devices were apparently made from pressure cookers hidden and backpacks. we quickly determined that the bombs had been constructed inside pressure cookers and the explosive material was taken from firecrackers that was combined with things like ball bearings and nails and pieces of steel to create shrapnel. the third component was the one that we thought would be probably the most definitive but we knew would take the most time and that is calling through the

volumes of video and photographic evidence. from hundreds of thousands of people taking photos and potential videos. and having surveillance cameras that lined the boston marathon route. at this time. we are looking for the public's cooperation. appealed to the public. and when you have 25,000 runners coming down boylston street, we knew a lot of loved ones had some video footage. there's any video any photographic evidence. if you can. please contact the fbi hotline. boy, did we get a response? received hundreds of thousands of video submissions. it's our intention to go through every frame of every video that we have to determine exactly who was in the area. we assembled teams to methodically go through citizen provided media. they.

honed in looking for the proverbial needle in a haystack. it was clear that they believed that video and photos held the key to identifying the suspects. investigators are under tremendous pressure. we didn't know who the perpetrators were. we didn't know whether the attacks were over. we didn't know whether they had more bombs . there was definitely a mentality that it was a matter of time before they may attack again. we felt let's get who caused this tragedy before they hurt anybody else in the world was on my shoulders as well as many others of my partners. we will go to the ends of the earth to identify the subject or subjects who are responsible for this despicable crime. and we will do everything we can to bring them to justice.

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responsible for this demand for information and answers is immediate and intense. who brought these devices in. the bombings occurred on tax day, april 15th. so we first thought it might be some domestic terrorist group that was opposed the united states government and didn't like paying taxes. just by looking at some of the characteristics of the bombing. the people that came to mind were al qaeda. you're thinking it's a huge, huge plot. i said no one from boston would ever do this because they know what it means to us. tamerlan joker and this family came to the united states from dagestan in the early two thousands, and they end up in cambridge. have brothers were here with their father, anzor, their mother, zuba debt and their two sisters. they grew up in cambridge. they went to cambridge public schools. i got to know them in

2003. they had not yet really acclimated to american society. that's one of the reasons i became friendly with him because i was one of the few russian speakers in the neighborhood car was much more passive child who would sort of sit at the back of the room and listen. it was clear that cameron was the prize horse of the family. he was the one who they really placed a lot of hope in they were sort of interested in getting me to know tamerlan does sort of give him advice on where to go to school and how to conduct himself. insert himself into u s society . they simply didn't really have a very good grasp of what was really possible. united states tamerlan had some idea that he was going to make a lot of money and have a mercedes benz. so i sense that there were some difficulties coming ambitions to become an engineer, but he took a year off from school in order

to box tamerlan was was a great boxer. his dream was to fight for the united states olympic team. he loved boxing. it was his passion. it was just outlet. as he got older and he started fighting semipro. he learned that he would never be able to be on the olympic team because he wasn't an american citizen and a lot of people told us that was a big blow to him into the family. we don't know this for a fact. but our assumption is that some of tamerlan's frustrations about his life here in the united states likely emerged from his failure to progress as a boxer. he continued working out at gyms and whatnot. but it wasn't the professional path that he was. he was on before. tamerlan ended up meeting a young woman named katherine russell. she came from a wealthy family and rhode island. her dad was a doctor. mom was a nurse. why it girl? by all accounts,

they hit it off their relationship blossoms. they fell in love, and they started dating and they got married. she was raised as a christian. but as she got closer to tamerlan, she came a muslim. she lived with the tsarnaev family in their home in cambridge, relatively close quarters and became pregnant and had a daughter. one of the great mysteries of the boston american bombing investigation is what katherine russell might or might not have known prior to the bombings. she was never charged federally. but that remains today and to be one of the great unresolved mysteries of the boston marathon bombing investigation. from all appearances, joe car seems to have assimilated better than tamerlan. if you listen to dzhokhar's teachers, he was like mr all american boy car goes to high school at a very prestigious school in cambridge , cambridge rindge and latin school previously attended by matt damon, ben affleck and patrick ewing. dzhokhar tsarnaev

was very popular in school very well liked by his teachers, his friends. i was captain of the wrestling team. always it cordial kid. happy peaceful and there was nothing malicious about him. car tsarnaev matriculated at the university of massachusetts dartmouth. his grades started to decline precipitously and he began to be more involved with his friends doing other things like smoking and distributing marijuana. if you look at dzhokhar's twitter feed, it's largely about trying to meet girls and take naps and eat cheeseburgers. i spoke to some former classmates who would say, oh, yeah, he's the chill guy. nobody expected this kind of thing to happen. dzhokhar seemed like he was destined for better things than detonating bombs on boylston street. i'm sure at one time in his life. he was a very lovely, caring young

man. what he turned into, obviously was we know what he turned into, he turned into a monster. wednesday we got our first really big break in the case. it was the video from a surveillance camera position just outside the forum restaurant. almost everyone turns in the direction of the first explosion. there's one person who doesn't turn there's one person who isn't surprised by that blast. your best defense against erosion and cavities is strong enamel. nothing beats it. new pron amel active shield actively shields the enamel to defend against erosion and cavities. i think that this product is a game changer for my patients. it really works. elites now that we've made travels so expensive, we have this hotel to ourselves. how do you get here, compared hundreds of travel sites to find a great

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hard to be patient. nobody knew. what they were looking for. nobody knew who they were looking for. on wednesday. april 17th. we got our first really big break in the case. i was called into my office. i went my agent, and he said, boss, take a look at this video. it was the video from a surveillance camera position just outside the forum restaurant. overlooking the scene of the second blast. in the foreground. it's people in the little four quarts of the restaurant, talking, snacking having some drinks. at 2 49. there's a massive explosion off camera. you can actually see everybody in the form video lurched forward just a little bit from the shock of the blast, and then in unison, everyone turns to the left. and shortly

after you see the second bomb detonated right there at the forum. there's just an explosion of white and everything disappears for a brief second. and then as that subsides, it's just clouds and dust. and. and carnage. unlike anything you've ever seen. it was just a horrible, horrible, horrible sight. investigators know somewhere in this video is the bomber. they just have to figure out who. we looked at it over and over and over again. they're looking for any kind of anomaly in that video that shows that one or two people are doing something differently than the rest of the people who were there to watch the race. we had dozens of eyes staring at this video trying to track every single person and we played it forward. we played it backwards but in slow motion and we could not figure out who the bomber was. we realized that maybe if we got more information about

that same scene at that same time, it might help us and sure enough, someone had submitted still photo from across the street that was pointed at the exact location of where the blast occurred. and that photo depicted from a different angle. a man with a white hat with a backpack at his feet. they zero in on him. what is this guy doing? in the video. you can see him walk into the frame. you see him with a backpack on his shoulder in places that backpack down on the ground stands there and then you see him in a cell phone call with somebody else and about 10. seconds later, you see the concussive effect of the first bomb going off down in front of the finish line. almost everyone turns in the direction of the first explosion. there's one person who doesn't turn.

there's one person who isn't surprised by that blast. he walks away when he gets about 10 ft from them, and i was selling this area blows up. we knew he was responsible for it suddenly that they're now able to see the trail. the challenge, then became find out where he came from in the area. so we assembled all of the video from those businesses to see how far away we could track that individual ensure enough. we find him coming down gloucester street that moment. that was the eureka moment, shall we say in the investigation? they were able to notice that he was trailing older sort of stockier guy. other person who was accompanying him on the video. i was wearing a black hat. so we suspected that the other person may have been responsible for

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so they can do more of what matters. benefits. payroll. compliance. trinet. people matter. layla her money. i get what you're worth worthy .com. i'm melanie is known in washington. and this is cnn. no a spent five days in the hospital. initially he wasn't injured anywhere, to the extent that i was because he was sitting down on my feet with his back up against my shins. when the bomb went off, i took everything in the back of the legs, the torso and the left hand. that's what shielded him. he walked into my room and without even missing a beat. he came up to me and he just gave me a hug. and he said, mommy, we're going to be okay, right? my son. yeah we're going to be okay. it was that moment. or i

think. i decided to survive. because i had to give him exactly what he needed. here in boston. president obama attended an interfaith service honoring the victims of monday's bombing . he told the congregation that the spirit of the city remains undaunted. they sought to intimidate us. terrorize us. to shake us from the values that make us who we are as americans . well it should be pretty clear by now that they picked the wrong city to do it. now it is thursday. we have the video of the two bombers, but we don't know who they are. for 24 hours. investigators kept those images a secret, hoping they could figure out who they were on

their own. because of the quality of the video. we weren't able to do some kind of photo recognition or other way to identify who they were. we've talked to victims to try to help us with sketches and descriptions of the bombers. none of that has brought us really anywhere. we knew somebody out there remembers. the american public would know who these two individuals were. then the question came. do we put it out? how do we hold on to it? several schools of thought there. one being that we need to hold onto this video evidence to work covertly behind the scenes to try to identify these individuals. and if we release the evidence and might cause him to flee. on the other hand, some of us myself included felt that this was the only way to identify these guys quickly. and they likely have more bombs. and what if more bombs go off in boston, and we're left holding this video evidence? but once we

obtained the video evidence from the forum restaurant, word of that leaked to the media, they knew that investigators were looking for two men with hats and backpacks will immediately a lot of people started looking at other photos and videos in an attempt to identify people they thought were the suspects. people desperately wanted to know who could commit such a terrible act of violence. so. ultimately what happened was the media leaked some photos of people that were said to be white hat and black hat. there are a couple of local students that had backpacks on that were other front page of the new york coast and they were not the perpetrators of this crime was causing kind of a chaotic, panicked scene where unsuspecting innocent people being vilified in their communities. we were really worried that those people were in danger. and so long

enforcement agencies hand was kind of forced the decision. time had come as to whether to disclose the images of the white hats and black hatted persons. director mueller decided that that's what we would do that thursday afternoon, president obama finished his speech and left wheels up from logan airport. they had a press conference and they released the photos. today we are enlisting the public's help to identify the two suspects. they had these big poster boards. they had several different photos of them different angles. they are identified as suspect one and suspect to appear to be associated suspect. one is wearing a dark hat suspect two was wearing a white hat. they were asking the public for any information about who they might

be. no one should approach them . no one should attempt to apprehend them except law enforcement. we were hoping that a citizen or somebody who knew these people would call in and let us know who we should go after. somebody out there knows these individuals as friends, neighbors, co workers or family members of the suspects. remember just everyone trying to figure out who they were. today. fbi officials released video and photos of two male suspects in the boston marathon bombings. the individuals were seen walking casually away. from the boston marathon after the bombs went off. we had so many people hit the fbi website in an effort to see the images that we essentially crashed, the fbi website. and that was a critical critical moment in the investigation. now there's an all out manhunt for these two suspects. i think police hoped

that when they released these images, the public would recognize these men call immediately and they would arrest these two suspects. and that's not what happened. there's always danger. it was a gamble that law enforcement had to take to get these guys. what we feared actually happened. unfortunately the bombers saw themselves on the screen and they decided to go on to the next phase of their plans. our worst nightmare happened that evening. it was really a night of sheer mayhem here. often sit down on it. we just had a carjacking. they have guns. 20 the brothers, of course,

proceeded to embark on a murderous crime wave. i think the way it ended. it was just a shocking as the way it began. the fbi had phone banks set up prepared for a massive wave of calls that would identify the two bombers, known only to them as black hat and white hat. tips started coming in. but before law enforcement could do anything to act on them. tamerlan and dzhokhar tsarnaev would gather up a handgun and a slew of homemade bombs and head out into boston ready to unleash more terror. next on part two of the boston marathon bombing. thanks for watching good night. mm. i couldn't believe my eyes. the kid firing right through the front windshield.