built from 2004 to 2013. that's it for me. thanks very much for watching. i'm wolf blitzer from washington. i will be back with a special-hour edition of the situation room. brooke baldwin starts right now. hi there. we begin this hour with that bloody rampage at a pennsylvania high school. a mass stabbing that injured 20 people, most of them teenagers. many of them hurt so badly, that they could have died. the suspect identified this identify as a student, a tenth grader. we saw him go by. he is all of 16 years of age. police say he was armed with not just one but two knives, ran down the hallway, through several classrooms before he

started slashing and stabbing people along the way. this happened before 7:15 this morning. this is 15 miles east of pittsburgh at franklin high school. the first indication that something was wrong was the fact that someone pulled the fire alarm. >> the fire alarm went off. i was walking over towards the exit and there was blood on the floor. i thought maybe someone had a nosebleed. someone yelled she got stabbed. >> this is the conversation between police and dispatch. we have got victims here. we need ambulances here as soon as possible. be advised the suspect is in

custody. only one suspect. >> 19 students and a security guard were injured. many of them were stabbed or slashed in the chest, back, or abdomen and some of the wounds were quite deep and this happened in a suburb. this is a small community, tight knit there in pennsylvania. all but one of the victims were high school students. and treating the wounds this morning, so severe and deep in cases were tough for doctors to save their lives. >> i'm an obstetrician. a number of these patients are kids that we very likely delivered. i think that the team doesn't really react with emotions. if i'm emotional it might just be coming out now as opposed earlier the response was a clinical response. the team did what they had to do. being a doctor living in the

community that you serve you can become emotional because they are your friends and neighbors. >> from one of the doctors, we will be hearing from more of the doctors from forbes hospital with an update. we know one adult male was taken in the hospital. 17 teenagers remain. we also have a opportunity from this high school on the phone standing by who witnessed much of the aftermath this morning. we will talk to him in a minute. first let me go first to jean. a lot of questions. just beginning with the victims, can you give me an update on the conditions right now? >> what we're learning, there are four different hospitals. you have to go to each hospital. we do understand that one that was in serious condition has been upgraded to fair. there were two in critical condition. one we just learned about some specifics. a 17-year-old male shot in the left part of his front torso

which we are learning seemed to be a pattern of the stabbing wounds. his liver and blood vessels were caught in the stabbing. he was rushed into surgery. the knife missed his heart and aorta. the resuscitation was critical. he was on life support and this was just as a few minutes ago. the doctors said something extremely interesting. by viewing the wound it was a large knife. we have heard nothing about what was the deadly weapon. >> we just know there were two knives. as far as the suspect goes, we could get more information in half an hour. we know he's a sophomore. what more do you know? >> 16 years old, sophomore. law enforcement is not releasing his name at this point. rather than his name, let's look at his state of mind. the doors had just opened,

classes had not begun. this person allegedly walked in with his fellow students, not one but two knives. the crime scene is multiple classroom s and hallways that ae very long. look at that state of mind and that scene and this is something that is critically serious. >> with the deep wounds one would question intention. thank you so much and now to the student that i mentioned, matt is on the phone with me. can you hear me? >> yep, i can hear you. >> wonderful. i understand, take me back to this morning. you hear the fire alarm. you thought it was a drill. when did you realize it wasn't a drill? >> caller: just as i was -- i would say stepping outside or i had just stepped outside. i noticed the sense of urgency. sort of more going from oh it's a fire drill let's just do this

to more of an everyone get out now, this is more serious. >> once you realize this is more serious and you start to see teachers rushing back into school and see some of the students removed, can you paint the picture, what did they look like? >> the first -- i saw one or two students come out and they appeared to be covered in blood, but i saw some more teachers pulling a couple more students out and the one, it looked like -- i think we had a lacrosse game scheduled for today. he had white pants on being dressed up for the lacrosse game and his pants were just covered in blood and it was truly terrifying. >> were they saying anything? i understand -- was it the teachers asking for hoodies or anything you had? >> these teachers, i noticed that the teachers right away they came up with what i thought

was a heroic idea and a great reaction was they asked the students to pass in their hoodies if possible so everyone, we all took them off and handed them to the teachers to use as tourniquets to stop the bleeding. it looked like that definitely helped. i couldn't really see, the teachers blocked the students a little bit because it was not good to look at. i didn't want to look but from what i could see that was very effective. >> in terms of the why part, we don't know yet, matt, but i'm curious if you have any idea, talking to any of your student friends what could have provoked this. was there any kind of warning? >> as far as i know there was no warning. i mean, i have heard some students speculating that he was acting differently this week, maybe, but they were only guessing. it just so cured to them now,

sort of an afterthought. but just looking at the victims there doesn't appear to be any pattern. most of them seem to be sophomores, i would say. there is not really any pattern that it follows. i wouldn't say that he targeted any of these people. i know one of them very well and i'm not sure how well he knew this person. but it would be, i would call it impossible to have anything against one of these victims. >> is your friend okay? >> yeah. he's doing all right now. i was just texting and talking to him on twitter. he suffered three stabs in his back when he was running away. and after being take on the the hospital, he seems to be doing okay now, and he said that he expects to be released by later today or early tomorrow. something like that. >> let me ask you. no one has spoken about the

knives themselves. this individual we're not identifying this sophomore with the two knives because he's 16 and police are not identifying him but did your friend describe, were they small knives, kitchen knives, long knifes? did he say? >> no he did not. i think that he was more shaken than anything and i think that it sounded like he was running away from what he has told me. i think he was more or less running away because he was scared and shaken. i don't know if he actually ever saw the person who stabbed him. i don't know if he ever saw it happen. it may have just happened while he was running away. >> and let me ask you about the assistant principal. i know you're in the band. it's the assistant principal who may have helped take down this young man and helped hand him over to police. tell me about your assistant principal.

sounds like he's a hero. >> yes, mr. king, he's a really great guy. i can't think of any negative criticism. he's really there for the students. anything he does you just never really ask him, you would never think twice about why he is asking you to behave a certain way. he is always doing things out of a best interest of students. i'm in the band. he actually acted as the administrator who went along on the trip. he was all about making sure we had a good time, being safe and getting the best experience possible. >> matt, i'm glad you're okay. we were talking about the assistant principal. i'm sure that was the school resources officer who helped subdue the perpetrator. on the phone with me,

medical director of upmc trauma surgery. doctor, can you hear me? >> yes, i can. >> my goodness, what a morning. can you just walk me through without obviously violating hippa, how many people have you seen describe the severity of the injuries. >> so at my hospital, we took care of one individual and i do have permission from the family to give you some information. he is is a 17-year-old gentleman who sustained a single stab wound on the left side of his torso. he arrived with very low blood pressure with evidence of massive bleeding in his chest and abdomen. we had him in the operating room to stop the hemorrhage in his chest and abdomen. >> how -- how -- teetering is the word that is coming to mind as far as how close, how touch

and go was it at times with him? >> he was very critically injured. he had massive bleeding and it's thanks to the life saving maneuvers that the ems crews provided in bringing him as quick lly as possible to a leve1 trauma center. this wound would have been fatal had he not arrived to a hospital capable of providing this type of treatment. >> i have heard that the ems response was phenomenal. >> he is still critically ill but we are optimistic. he will need additional surgery in the next several days. >> thank you to you and your team. best wishes to the 17-year-old young man. as we await the news conference from one of the other hospitals, pamela brown will join me live

outside of franklin regional hospital where she just arrived so you will see the scene. also ahead, the other major story in the urgent search for flight 370, crews hearing not one but two new signals that are consistent with the black box pinging from the plane. stay with me. two major stories on this wednesday. what's your function? ♪ ♪ hooking up the country helping business run ♪ ♪ build! we're investing big to keep our country in the lead. ♪ load! we keep moving to deliver what you need. and that means growth, lots of cargo going all around the globe. cars and parts, fuel and steel, peas and rice, hey that's nice! ♪ norfolk southern what's your function? ♪ ♪ helping this big country move ahead as one ♪ ♪ norfolk southern how's that function? ♪ i'm bethand i'm michelle. and we own the paper cottage. it's a stationery and gifts store.

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with non-insulin victoza. for a while, i took a pill to lower my blood sugar, but it didn't get me to my goal. so i asked my doctor about victoza. he said victoza works differently than pills, and comes in a pen. and the needle is thin. victoza is an injectable prescription medicine that may improve blood sugar in adults with type 2 diabetes when used with diet and exercise. it is not recommended as the first medication to treat diabetes and should not be used in people with type 1 diabetes or diabetic ketoacidosis. victoza has not been studied with mealtime insulin. victoza is not insulin. do not take victoza if you have a personal or family history of medullary thyroid cancer, multiple endocrine neoplasia syndrome type 2, or if you are allergic to victoza or any of its ingredients. symptoms of a serious allergic reaction may include swelling

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>> welcome back. i'm brooke baldwin and we take you back to the coverage of this horrendous event. the stabbing rampage that injured 20 people in murraysville, pennsylvania. there are already all kinds of stories of heroism. the assistant principal helped stop what was happening. the teen age girl who kept call applying pressure to a boy's wounds. take a listen. >> he was having significant bleeding and his ability to survive this is due in part to her. >> pamela brown arriving on school grounds. what more can you tell us?

>> reporter: we are just arriving here. very quiet right outside of franklin regional heritage school. earlier today it was a very chaotic scene as one of their fellow students went on a stabbing spree here and we know that several students remain in the hospital. the ages of the students injured range from 14 to 17 years old. we know that a couple of them are still in critical condition. many of them had stab wounds to their stomachs and one of the victims was a 17-year-old according to a doctor we just heard from, a 17-year-old in critical condition who went into surgery right after the attack happened. the students here very shaken up. this all happened right before classes even started this morning and many students didn't know what was happening because this was a stabbing spree they didn't hear gunshots or anything else indicating what exactly was going on. some thought that a fight was breaking out and so students started running out and

apparently this attacker, this 16-year-old student who we're not naming right now was just going around and stabbing anyone who was in his way going from classroom to classroom and stabbing students in the hallways. 20 people injured all together. we know that the suspect is being questioned at police headquarters here. he was take on the the hospital for a wound to his hand. the fbi is involved and you can bet they are looking through his computers and interviewing students. there are about 1200 students. figuring out if he was bullied. >> pamela brown, thank you. just again a quick reminder as we're getting more information. this happened hours ago. and we will be taking a news conference and hearing from some

of the doctors treating some of the students and one adult. in the meantime, another possible breakthrough. crews hearing not one but two new signals that are consistent with the black box pings from a plane. could this be it? the man in charge of the search is pretty confident.

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>> we are staying on the school

stabbing story awaiting that news conference as we mentioned at the bottom of the hour. let me talk about the big story we have been talking about for weeks. it was called a monumental task. locate the black box pings heard over the past weekend and incredibly they believe they have done just that. officials are saying they are optimistic that they will find the plane's wreckage. not just one. two new signals picked up by the u.s. navy's pinger locater towed behind the ocean shield. that brings the total of four possible black box signals over the past several days. all of them located within 17 miles of one another. the question now, where to go from here. joining me now to discuss, former chairman jim haul. al -- hall. and also joining me, author of

"why planes crash". feeling like there is opt mitch and a real lead. a count of four signals within this 17 mile stretch. how significant is that? do you think they might actually find this plane? >> first, let me say in light of the past disappointments and respect to the families, i think we have to be very conservative. but this is encouraging news. and hopefully it will lead to the discovery of the wreckage. >> why are you still dubious? >> well, because this is about a 500 mile search area. the depths of the water are about 15,000 feet. the possibility of silt or other debris covering up the wreckage

or the batteries running out before is a real possibility. >> so you mentioned the silt. obviously we have been talking a lot about the fading battery life. let's say, we know the last two signals were weaker. let's say they hear nothing else, do searchers have enough information to pull the trigger and put the submersibles underwater to find the black boxes? >> absolutely they do. what they're doing is trying to get more pings so they can narrow in on where specifically they are coming from. they have propagation, so they are reflecting and coming down again. that does complicate the search. the first ping was two hours and it was quite a bit further north. >> first ping two hours.

second we thought we might have heard sets of pings. we heard the ping from the voice -- cockpit voice recorder. this leads me to my next question. here we are five weeks out. still despite all of the reports of possible pings, no debris has been found yet. is it possible -- does that give this whole theory of the plane being underwater more or less in tact more -- could that really be the situation? >> you know, i'm leaning more and more that way because of the fact that before, at first we were looking for debris and then we were going to have to reverse engineer or reverse track that debris back to a singular point which is nearly impossible to do because the pieces would be so spread out. now knowing the single point and forecasting, forward casting what happened from that point forward from the impact point. now you would think there would

be a lot more debris to spot and they are spotting in those areas and not finding anything. i am leaning towards the fact that it is more in tact than say the flight 447 was in the air france accident. >> jim hall is that possible? i want to end with you. is it really possible that the triple 7 could have crash landed in tact? >> not in my experience. both twa and egypt air had several debris fields. one person's opinion is as good as anothers until we find the wreckage. >> jim hall, thank you both so much. we have talked a lot about exactly how deep the indian ocean is in this search area. coming up, we will tell you

about this one piece of technology that can go deeper than any other. it is called the alvin and can go nearly three miles underwater and can carry up to three scientists. coming up next we will talk about that. we will stay on the story we have been watching out of pittsburgh talking to another student, this student an eyewitness to the violent stabbing that unfolded at a pennsylvania high school. she will explain what happened and how she made it out safely.

>> welcome back. we are following this utter nightmare unfolding within the walls of this pennsylvania school. armed with two knives, a 16-year-old described by some as

an introvert stabbing and slashing his schoolmates right around home room time. that suspect is now under arrest. many of his victims around 14 and 17 are fighting for their lives. a classmate of this accused stabber watched as he took these knives and used them on her own classmates, one of them her own friend. she joins me now by phone. mia can you hear me? >> yes. >> tell me what you saw. >> i was putting my books away and i heard a commotion behind me and i wasn't sure what it was at first. i turned around and i saw a

freshman boy on the ground and the boy who was stabbing people on top of him. at first i thought they were just fighting because i didn't know what was happening. i didn't really see any of the knives. the freshman boy was fighting back so it looked like just a fight and the boy who stabbed him got up and ran away very fast. the freshman boy lifted up his shirt and was gushing blood from his stomach all over. it was very terrifying. there was also a girl who got caught in the middle of it. her arm was held out and her arm was gushing blood so i ran over and asked if she was okay and i tried to help her. then a teacher came and i heard people coming down the hallway where the stabber ran and they were screaming get out, run, he has a knife. the teacher said i'll take care of her. you can run. >> how quickly did all of this happen, was this a matter of

seconds? was this minutes? >> i would say at most five minutes. >> five minutes. so in total how many people it sounds like you saw a number of people hit by these knives? >> yeah, i only saw two actually get hit because i wasn't down at the other part of the holloway but i know my friends saw the other ones so people were just scare scared. no one has really been describing the knives he used c could you describe them at all? >> i didn't directly see the knives but i heard from friends who said they did see the knives that they were larged and they looked like rollers almost? >> how do you mean? >> they were that big. >> like a rolling pin size? >> like a measureing ruler.

>> is he in some of your classes? >> he is in two of my classes and i have had past classes with him. >> describe him for me. >> he is really -- he is kind of quiet and he keeps to himself. he was never mean to anyone or like dislike anyone and i don't think anyone really disliked him but he didn't talk to that many people and i never saw him with a particular group of people that he hung out with or anything. >> and quickly you say you had a good friend among several whom you saw stabbed. are they okay? >> he is fine. he just got hit but he is out of the hospital with some stitches. >> my goodness. thank you so much for calling us. our thoughts and prayers with this entire community. what a horrendous morning. and coming up, this is another story we're watching for.

any moment. the president is expected to speak at this memorial service at fort hood there in texas. we will take you back there live. stay right here. >> we are going to to take you live now to fort hood as we wait for this memorial service to begin. take a listen.

♪ whose brigoad stripes and brit stars ♪ ♪ through the perilous fight ♪ or the ramparts we watched ♪ were so gallantly streaming ♪ and the rocket's red glare ♪ the bombs bursting in air ♪ gave proof through the night ♪ that our flag was still there ♪ ♪ oh say does that star spangled banner yet wave ♪

♪ ore the land of the free ♪ and the home of the brave >> ladies and gentlemen, chapla chaplain colonel matthew gough. >> would you bow your heads as we pray, we pause to acknowledge you, the god of all comfort and mercy. we ask that you would be with us, collectively and individually and bring healing as we remember and honor our three fallen comrades daniel,

carlos, and timothy. walk with us to console and sustain us. encourage us by your spirit and by the presence of family and friends that gather around us, walk beside us and lift our broken hearts. and now as we grieve the lost of these three men we thank you for their selfless service and for the legacy that they leave behind. bless their memory and may our thoughts of them and your healing touch sustain each soldier, family and friend in the days ahead in your holy name we pray. amen. >> please be seated. ladies and gentlemen, lieutenant general mark milly.

>> president and mrs. obama, deputy secretary of defense fox, secretary mccue, general and mrs. dempsey, lieutenant gorn ogovernor duhurst, soldiers and civilians and most of all the families and friends of our fallen and wounded warriors. thank you all so very deeply for being here today and we since sincerely in our heart of hearts appreciate your presence and your support and your compassion as we struggle through a very difficult time. today we mourn. we mourn for those we lost one

week ago on april 2. and today we honor the lives they led. the three fallen soldiers came from hometowns as far apart as peurto rico and central illinois. they all had different lives but they were united by a single desire, a desire to serve their country and their willingness to answer their nation's call in time of war. to the families of the fallen, we want you all to know that we here at fort hood, we here in central texas, we here in the united states army and the entire nation want you to know that we stand with you, that we grieve with you, and that we will be here for you not just

today, not just tomorrow, but forever. you are in our hearts and in our prayers and we will never forget your loved ones' sacrifice for our nation. to the soldiers who were wounded and to your families we wish you all a full and complete and speedy recovery. and we here at hood will stop at absolutely nothing to make sure that you and your families have the resources and care that you need to heal. many of you demonstrated exception aal v aal valor in thf danger and your strength is an inspiration to us all. to the heroic first responders who risked their very lives and to the medical teams who cared for the wounded and the fallen, thank you all for not only what you did on 2 april but what you do every single day in the line

of duty. to the central texas community and people all over the country and literally all over the world, your compassion gives us all greater strength. yes, today is is a day of mourning. a day of morning for the fallen. it is also a day to honor their lives and the service of staff sergeant rodriguez, sergeant timothy owens and sergeant first class daniel ferguson, each made the ultimate sacrifice here at home. among their brothers and sisters in arms. the pain of losing our comrades cannot extinguish the memory of what made each of them unique and so much beloved. staff sergeant carlos rodriguez

came from a close knit family. he enlisted at 18. he deployed once to kuwait and twice to iraq and provided logistical support to ft. bragg and hawaii. he earned numerous decorations including the combat action badge and on april 2 he was tragically just months away from a well earned retirement. and he is survived by his son, his parents, his sisters and a brother who are here today with us. sergeant timothy owens was from epingham, a small town in central illinois. he liked baseball and football and wrestling and tie kwan doe. he blame a black belt and taught

martial arts before joining the army. he served as a heavy vehicle driver and was stationed at fort stewart, georgia, and in kuwait before moving here in 2011. in 2005 he deployed for an entire year in support of operation iraqi freedom and there he earned his combat action beiadge under fire. he is survived by his wife, three children and his mother who join us today. and sergeant first class daniel ferguson grew up in small town mulberry, florida. he played football and baseball and basketball. he also ran track. in his two decades of military service he was stationed in italy, germany and bases throughout the united states. and he, too, deployed to kuwait, iraq, and afghanistan. and he, too, earned many awards

for outstanding service including a bronze star and three service medals. and on that day, the second of april, one week ago, sergeant ferguson died a hero. he was shot as he held a door closed to protect a room full of other soldiers. he put himself in the line of fire to save them. and he is survived by his daughter, his parents, his brothers and sisters, and at the time of his death, he was engaged to be married. every member of the united states military is here today is proud to have served alongside these three soldiers and they are part of eternity now but they are not god. they are not forgotten. and they never will be. they endure. they endure in the hearts of

those who love them and in the hearts of the soldiers and civilians who make up the fort hood community. we will honor our fallen not today but every day. every day that is to come we will honor them by striving to be worthy of their sacrifice. in this time of tragedy we see the true strength of our community and our people. they say all of you here at fort hood and all in central texas have been through the fire and you are strong and more determined than ever. and although this day is a day of grief, it is also a day of pride. pride in the military police woman who bravely faced down the gunman and helped to end that violence. many would have taken a step back and sought cover. she took a step forward. and the chaplain who was here with us today was injured and

the wounded soldiers who stayed cool under fire, provided first aid to themselves and others and had the presence of mind to dial 911 even though they were wounded. many took the side of action. pride in the health care professionals who rapidly cared for 16 wounded soldiers. and the many, many caring men and women who have reached out to us with donations and other acts of service and above all, pride in the service and sacrifice of staff ar gent rodriguez, sergeant owenss and sergeant first class ferguson. each of whom gave that last full measure of devotion to their country. to the families of the fallen, to the wounded warriors and loved ones, to everyone in our community in need of healing, may god bless each and every one of you and give you peace.

thank you for being with us today. i ask that you take care of yourselves. remember the fallen in your families and prayers. take care of each other, phantom warriors, army strong. >> ladies and gentlemen, the chief of staff of the army. >> good afternoon, everyone. we come together today to care for our soldiers and their families who together have sacrificed so much over the last

13 years of war. we come together as an army family. to grieve the sudden and tragic loss of four of our own. we come together to help 16 wounded soldiers heal and we come together to stand beside the families of the fallen and injured in their time of need. president and mrs. obama, your presence here today speaks numerous volumes. distinguished members of congress, thank you for coming down here today. deputy secretary of defense fox, secretary of the army mccue, the leader of our army, chairman and mrs. dempsey and other distinguished statd leaders, thank you for your support, thank you for your contributions to fort hood.

but most importantly, i want to thank the soldiers, the families and civilians of fort hood and the surrounding community. i want to thank lieutenant general mark milly and scott sh roader. we are fortunate to have experienced dedicated leaders to guide us through these difficult days. our job as leaders is to propair soldiers for the chaos of war. the loss of any soldier in any circumstance is a tragedy for a unit or for a family. yet somehow the loss of comrades in the heat of bat tle is a ris that we understand and with time we can accept. that these soldiers were lost on american soil and at the hands of one of our own makes this tragedy heartbreaking and

inexplicable. this especially hits home for linda and i because fort hood and the greater central community has been my family's home away from home for more than seven years. having served here as the commander of a brigade, the fourth infantry and more. i have experienced the warmth and resiliency of the soldiers and community. the fort hood family has been central to the army's success over the last 13 years of war sharing in our victories and grieving when we lost those dearest to us. you were there for us and for our families when we deployed forces whether it be to iraq or afghanistan. you were there for us when we struggled to understand and recover from the events of november 5, 2009, and the loss

of 13 people. today we are all here to tell you and to show you that our army and our nation are here for you. we cannot help but feel the echoes of that most horrible day in the tragedy we now face. for many the events last week reopened the wounds of five years ago. we are heartbroken that the same units and soldiers, families and communities who have supported unit after unit deployments to iraq and afghanistan and sacrificed so much must endure yet another burden. we must learn from the events

and support and heal one another. we must come together to identify the risk factors that lead to violence. to address the challenges of mental illness. to enhance the resiliency of our families. any time a soldier believes that hurting ones self or others is is a solution, we must insure that the army family is there for them to show them another way forward. and to lift them from their despair. lost to us were three soldiers were more than 50 years of service to the united states army. first class danny ferguson served for nearly 21 years across the country and around the world including four deployments. his fiance shared with us that the army was danny's life.

he was proud to be part of a great service. staff sergeant rodriguez followed in the footeps of his father to enlist fromhis hometown. during his nearly 20 years, carlos was known for being a meticulous soldier, leading from the front with a tough but kind down to earth nature. sergeant timothy owens enlisted in the army in 2004 and served for more than ten years as a motor transport operator including two deployments to iraq and kuwait. the loss of these three soldiers is a terrible tragedy to our army family. our hearts and prayers go out to each of the soldiers' families and their units. every day we learn from witnesses and the wounded about the heroic actions of first

responders who prevented the loss of even more lives. we are indebted to the first military police officer on the scene, a soldier in the 89th military police brigade who advanced alone to confront the shooter in an effort to stop the rampage. then there is the heroism of sergeant first class ferguson and major patrick williams who were injured while trying to save the lives of many soldiers. we are grateful for the rapid reaction and exceptional reactions of first responders and medical triage teams whose actions were nothing short of

extraordinary. there are certain people who are able to step up in the most difficult times and do something heroic. no one quite understands what characteristics will cause someone to display incredible courage or sacrifice to their own safety. but we see it time and time again from the soldiers of this great army. the large majority have shown incredible resiliency and personal growth in the face of repeated deployments as well as the normal stress of our everyday lives but there are some who struggle to bounce back and find peace among life's challenges. we do not know why one soldier is strengthened in tough times and another cannot see a way forward, but we must and we will be there for them. in the days and months ahead,

our highest priority will be to care for wounded service members, their families and the families of the fallen. we will do everything within our power to investigate every detail to learn, to adapt and to protect our most valuable resource, the men and women of our u.s. army. i have once again been touched by the strength of the american spirit that our country was built upon. i'm inspired by the stories about soldiers, families, civilians, communities, businesses, and private organizations giving so generously of themselves their resources. the family readiness groups, the red cross, the uso and local businesses who immediately reached out to our fort hood family. as we have during other difficult times, we will have strength in unity.

we will all stand together as a community. we will all stand together as an army. and we will all stand together as a nation. we will lift each other up with our compassion, our strength, and resilience because that's who we are. the strength of our nation is our army. the strength of our army is our soldiers. and the strength of our soldiers is our families, and that's what makes us army strong. thank you very much. >> ladies and gentlemen, the secretary of the army, the

honorable john m. mchugh. >> good afternoon. mr. president, mrs. obama, sir, ma'am, thank you so much for being here. it means so much to these soldiers, to this army that their commander in chief and first lady would be here to share in this great sorrow. deputy secretary of defense fox, chairman and mrs. dempsey, chief and mrs. odierno, distinguished members of congress, lieutenant governor dirhurs, and most of all to the men and women of fort hood, soldiers, family members, civilians, our army family. we are here again far too soon

to mourn more loss all too great. as an army, we accept this is is a dangerous profession. and all who wear this wonderful uniform and pledge to defend our nation and its way of life understand they may one day be called to make that ultimate sacrifice. but inside these gates, behind these walls, we expect a much different order of things. a special sense of safety and security, of brotherhood. simply a sense of home. and yet, for a second time, horrible violence and unspeakable tragedy have breached these walls and torn through our very souls and once more, yet again, we come together to grieve and to

remember to console one another and to give what strength we possibly can to the victims and to their families. sergeant first class daniel ferguson, staff sergeant c sergeant carlos rodriguez and sergeant timothy owens all knew and lived with and accepted that danger comes with being an american soldier. each deployed various times during the longest period of war, that they came back, came back safely each and every time only to lose their lives here at home. a place of presumed safety serves to grately magnify the senselessness of it all. of course these men were not just soldiers. they were so much more. they were comrades.

they were friends. they were leaders. and of course they were sons and husbands and fathers. they are rightly to be long remembered, mourned, and forever celebrated. we still have much to learn about what happened here last week, but already we have heard the stories of remarkable courage, extraordinary sacrifice, actions that kept that moment of horror from becoming even greater. we may never know how many lives were saved or how many others might have been lost were it not for these heroes but know this. we are incredibly grateful for their bravery and more humbled by their selflessness. 150 years ago, president abraham lincoln penned a letter to a mother who had lost five sons during a civil war. the president said i feel how

weak and fruitless must be any word of mine at a time of grief and loss so overwhelming. to the families of those we lost, to those recovering from their wounds, i truly wish i had the words that might begin to heal your heart and heal your bodies or express fully the depth of our collective saddens. matthew chapter 5 verse 4 teaches that blessed are they who mourn for they shall be blessed. today, once again, we mourn together. together as a community, as an army, and as a nation. today all day we will celebrate these truly remarkable lives, courageous and noble men taken from us far too soon. and we hope and we pray that in

some small way, together through our memories and collective heart ache we will bring some comfort to their families, friends, and comrades in arms that they will be truly and always missed. so thank you for joining us. god bless our fallen heroes, those still struggling towards recovery. god bless the united states of america and this glorious army who keeps us free. >> ladies and gentlemen, the president of the united states, president barack obama.

>> in our lives, our joys and in our sorrows, we learned that there is is a time for every matter under heaven. we laugh and we weep, we celebrate and we mourn. we serve in war and we pray for peace. the scripture also teaches that alongside the temporary, one thing is eternal. love bears all things, believes all things, hopes all things, endures all things. love never ends.

deputy secretary fox, general dempsey, secretary mchugh, jenls odierno and milly and most of all the families of the soldiers who have been taken from us, the wounded, those who have returned to duty and those still recovering and the entire community of fort hood, this great place, it is love tested by tragedy that brings us together again. it was love for country that inspired these three americans to put on the uniform and join the greatest army that the world has ever known. sergeant first class daniel ferguson, staff sergeant car

close rodriguez, sergeant timothy owens. danny and carlos joined two decades ago in a time of peace and stayed as the nation went to war. timothy joined after 911 knowing that he could be sent into harm's way. between them they deployed nine times. each served in iraq. danny came home from afghanistan just last year. they lived those shining values loyalty, duty, honor, that keep us strong and free. it was love for the army that made them the soldiers they were.

for danny, said his fiance, being in the army was his life. carlos, said a friend, was the epitome of what you would want a leader to be in the army. timothy helped counsel his fellow soldiers. said a friend, he was always the person you could go to talk to. and it was love for their comrades, for all of you, that defined their last moments. as we have heard when the gunman tried to push his way into that room, danny held the door shut, saving the lives of others while sacrificing his own. and it is said that timothy, the counselor even then, gave his life walking towards the gunman, trying to calm him down.

for you, their families, no words are equal to your loss. we are here on behalf of the american people to honor your loved ones and offer whatever comfort we can. but know this. we also draw strength from you. for even in your grief, even as your heartbreaks we see in you that eternal truth, love never ends. to the parents of these men, as a father i cannot begin to fathom your anguish but i know that you poured your love and your hopes into your sons. i know that the men and soldiers they became, their sense of

service and their patriotism, so much of that came from you. you gave your sons to america and just as you honor them always, so, too, will the nation that they serve. to the wives of the fallen, these soldiers cherished the army but their hearts belong to you. and that's a bond that no earthly power can ever break. they have slipped from your embrace but know that you can never be alone. this army and this nation stands with you for all the days to come. to their children who live in a dangerous world, and your fathers serve to keep you safe

and us safe. they knew you have so much to give to our country that you would make them proud. timothy's daughter, lori, already has. last wednesday night she posted this message online. i just want everyone to think for a moment. love your family, she said, because you never know when they're going to be taken from you. i love you daddy. to the men and women of fort hood, it has already been mentioned part of what makes this so painful is that we have been here before. this tragedy tears a wound still raw from four years ago. foreign war zones we-- those wh

survived foreign war zones were struck down here at home where they are supposed to be safe. we still do not know why. we must honor their lives not in word or talk but in deed and in truth. we must honor these men with a renewed commitment to keep our troops safe not just in battle but on the home front as well. in our open society, we can never eliminate every risk but as a nation we can do more to help council those with mental health issues to keep firearms out of the hands of those who are having such deep difficulties. as military you must do

everything to secure the spirit of those in pain. we must honor these men by doing more to care for our fellow americans living with mental illness, civilian and military. today four american soldiers are go gone, four army families are devastated. as commander in chief, i have determined that we will continue to step up our efforts to reach our troops and veterans who are hurting, to deliver to them the care that they need and to make sure we never stigmatize those who have the courage to seek help. we must honor these men by recognizing that are members of a generation. now our troops are coming home and by the end of this year our war in afghanistan will finally be open.

in an era when fewer americans know someone in uniform, every american must see these men and women, our 911 generation as the extraordinary citizens that they are. they love their families. they excel at their jobs. they serve their communities. they are leaders. when we truly welcome our veterans home, when we show them that we need them not just to fight in other countries, but to build up our own, then our schools and our businesses, our communities and our nation will be more successful and america will be stronger and more united for decades to come.

sergeant first class daniel ferguson, staff sergeant carlos rodriguez and sergeant first class timothy owens, like the 576 fort hood soldiers who have given their lives in iraq and afghanistan, they were taken from us much too soon, like the 13 americans we lost five years ago and their passing shakes our soul. in moments such as this, we summon once more what we have learned in these hard years of war. if we reach within our wounded hearts, we lean on each other, we hold each other up, we carry on, and with god's amazing grace we somehow bare what seems

unbarable. love bears all things. believes all things. hopes all things, endures all things. love never ends. may god continue to bless the united states of america with patriots such as these.

>> ladies and gentlemen, at this time, staff sergeant from the first calvary division will sing amazing grace. ♪ ♪ amazing grace, how sweet the sound ♪ ♪ that saved a wretch like me ♪ i once was lost, but now i'm

found ♪ ♪ was blind but now i see ♪ twas grace that taught my heart to fear ♪ ♪ and grace my fear relieve d ♪ ♪ how precious did that grace

appear ♪ ♪ the hour i first believed ♪ when we've been there 10,000 years, bright shining as the s n sun ♪ ♪ we've no less days to sing god's praise ♪ ♪ than when we've first begun

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he said victoza works differently than pills, and it comes in a pen. and the needle is thin. victoza is an injectable prescription medicine that may improve blood sugar in adults with type 2 diabetes when used with diet and exercise. it is not recommended as the first medication to treat diabetes and should not be used in people with type 1 diabetes or diabetic ketoacidosis. victoza has not been studied with mealtime insulin. victoza is not insulin. do not take victoza if you have a personal or family history of medullary thyroid cancer, multiple endocrine neoplasia syndrome type 2, or if you are allergic to victoza or any of its ingredients. symptoms of a serious allergic reaction may include swelling of face, lips, tongue or throat, fainting or dizziness, very rapid heartbeat, problems breathing or swallowing, severe rash or itching. tell your doctor if you get a lump

or swelling in your neck. serious side effects may happen in people who take victoza including inflammation of the pancreas (pancreatitis) which may be fatal. stop taking victoza and call your doctor right away if you have signs of pancreatitis, such as severe pain that will not go away in your abdomen or from your abdomen to your back, with or without vomiting. tell your doctor about all the medicines you take and if you have any medical conditions. taking victoza with a sulfonylurea or insulin may cause low blood sugar. the most common side effects are nausea, diarrhea, and headache. some side effects can lead to dehydration, which may cause kidney problems. if your pill isn't giving you the control you need... ask your doctor about non-insulin victoza. it's covered by most health plans. >> and welcome back to cnn. i'm brook baldwin. let's begin with what happened

this morning in pennsylvania. we have new details at what happened at a high school outside of pittsburgh that left 20 people injured and a student, a 16-year-old in custody. the weapons? two knives. this started shortly after 7:00 this morning. this was murraysville, pennsylvania, the suspect a sophomore all of 16 years of age. he went from classroom to classroom through the hallways stabbing anybody in his way. some of the very young victims were air lifted to the hospital, their injuries described as life threatening. two had to undergo surgery. i talked to a student at this high school. he described what happened. >> first, i saw like one or two students coming out and they appeared to be covered in blood.

i saw more teachers pulling more students out. i think we had a lacrosse game scheduled for today. they were dressed up in their dress clothes and he had white pants on and his pants were just covered in blood and it was truly terrifying. i noticed that the teachers right away they came up with what i thought was a heroic idea. a great reaction is they asked the students to pass in their ho hoodies if possible. we took them off and handed them to the teachers to use as tourniquets to stop the bleeding. >> i also talked to another young woman who had two classes with the suspect and here is how she described him to me. >> he is really -- he's kind of quiet and he keeps to himself. he was never mean to anyone or like disliked anyone and i don't

think anyone really disliked him but he didn't talk to that many people. i never saw him with a particular group of people that he hung out with or anything. >> let's take you now to that scene right outside of the school. pamela, it is way too early to begin talking motives. what more have you learned in the hour plus that you have arrived there? >> it's becoming increasingly clear that it was just a scene of chaos and confusion when the stabbing spree occurred when classes started. some of the students wounded say they didn't understand what was going on. they didn't see the attacker coming or going. all of the sudden according to doctors, they felt pain and they didn't know, they were hearing that from other students as well. they heard screams and saw blood. one student thought a fight was breaking out. she saw a student on the ground

and that's when she saw the attacker holding a knife. we have learned that a male sophomore, a 16-year-old who we are not naming because he is is a juvenile, was wielding two knives at the time of the shooting spree. they say he was going around and stabbing whoever went by him. he was going from classroom stabbing whoever was in the way. a student or another person in the school pulled a fire alarm and that helped evacuate the students. there were several heroes, quick thinking people in the school that helped save lives. of course there was one female student who helped put pressure on the wound of another and the doctor said that perhaps saved that student's life. and we heard about the assistant principal who lived right down the road from the suspect who apparently tackled the attacker and prevented further injuries in the stabbing spree.

we know that the suspect was treated for minor injuries to his hands and he is back at the police station being questioned. a thorough investigation is underway. the fbi is helping with that trying to figure out why he did this. >> as they figure out the why, let's talk about some of the victims. i spoke with a trauma surgeon describing a gruesome wound. can you bring us up to speed as far as how many are still in the hospitals and what the conditions are? >> reporter: we know that at least 19 classmates ranging from ages 14 to 17 were wounded and there was one adult, the school security guard that was injured as well. the numbers are in flux right now but several have been discharged from the hospital. they have had minor stab wounds but others had more krcritical

wounds. doctors say, brook, that the students with the serious injuries are expected to survive, though they do have serious injuries. the doctors say the fact that they are young really works in their favor and helps in their recovery. but certainly a tough situation out here. >> way too young to have to endure anything like this. pamela brown out here for us, thank you so much. and we get new information, we are getting more insight into how this event unfolded this morn i morning. i want to play this out. >> i have my whole shift coming your way. >> the first hallway on the right half way down. we have horrible victims here. we need ambulance here as soon as possible.

be advised the suspect is in custody. only one suspect. >> one suspect. much more on that breaking story out of pennsylvania. first the other major story, and now another possible breakthrough, crews hearing now not one, two new signals that could be the pings from the airplane's black boxes, could these final crews, could these leads really track down this missing plane finally? that's next.

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go long. >> welcome back. i'm brook baldwin. just when it seemed the trail was literally going cold, new sounds were heard in the ocean. searchers are now optimistic. this is their word that these could be from the pingers. see this graphic here. this brings the total to four possible black box signals. all of them located within 17 miles of one another. by the way the two signals here are more faint than the previous ones and the man in charge believes that these ping

batteries are dying. joining me now is safety analyst and author of why planes crash, david. welcome back to you. the guy in charge of these things says the batteries could be dying does that make sense why they were more faint? >> it could be two different things. angus houston stated in his address that his pinging was less in his opinion the fact that the batteries were getting low that they are further from the center of where the pinging is located. >> how does this work? we know through triangulation, trying to hone in on the genesis of the pings and that would be the black box. it seems like they are over here one day and over here another day. how do they find the center? >> what they're trying to do, right now they have a dome.

through up one of the areas of the dome. less period. so the idea is that you want to go all of these different directions to try to narrow it down and figure it out. unfortunately they're not getting a long time period of the signal so they are skirting the edge of the dome. they need to get back to the senter and get back to the two hour stretch. >> let's say they are in the neighborhood of the wreckage or at least of the black boxes and let's say they do not hear any more pings. then what?

there is no sense in putting them in right now. if you do it will interfere with the signals. everything is clear. there is nothing in the debris area. then at that point, once the batteries are dead, that's when the blue fin gets to work. >> that is the submersible with the pretty accurate sonar. thank you. thank you as always. we have talked a lot about exactly how deep the indian ocean is especially in this search location. coming up we will tell you about the one piece of technology that can go deeper than any other. it's called the alvn. it can go nearly three miles underwater. next. [ grunting ]

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>> right now in the deep, deep waters of the indian ocean, may disrupt any fading pings from the black boxes because the ocean is nearly three miles deep. officials are limiting sea traffic in these areas to try to keep the waters calm and quiet, plus they are not deploying underwater search vehicles just yet. that could happen. that could interfere with any signals. the sheer depth of the ocean is creating obstacles themselves. with just a great visual explanation that is 3d.

>> your bottom time is literally nothing. the empire state building, about 1200 feet, all the way to the bottom of the grand canyon, about 5,000 feet. we're still lower than that. we're 13,000 feet and farther down than that. let's say you have the vessel on top of the vessel and you're pulling this wire. it's almost 10,000 feet. you need 2.8 miles of cable to get it that far below the boat. you have a giant fish on your line, brooke, and you're trying to reel it in. you have got 2.8 miles of line. you don't know exactly where that fish is down there plus it's 2.8 miles down that way

somewhere. so we're talking about how sometimes that's a 14 mile distance between where one ping was located. let's say the boats were doing this and that was 2.8 negative and 2.8 negative here and we're only about nine miles apart. the depths are crushing 7,000 psi. i have a great power washer. it's 1500 psi. if i'm wearing flip-flops and i scrape my toe, it will take the skin off. it's trying to crush this can, this pinger as much as it can way down in the depths. not a bit of light gets down there at all. >> chad, hang tight. i want to keep that graphic up.

we talked about not as hip technology as we did today. we're talking 15,000 now and it is an hov, human operated vehicle, called the alvn that maybe could go that deep. >> this is really pushing it for alvn. it is rated for about 14.5,000 feet. they would most likely send down a remotely operated vehicle. whether you pick one of several very capable remotely operated vehicles, that's probably where they would start. something like alvn would be the caboose, the last thing. >> they are trying to hone in, negative, positive, where the ping would be coming from, the genesis of the ping. the last two faint maybe because the batteries are dying, maybe

they were farther away. it could be buried. describe the silt and how deep could it be? >> this stuff is we call it marine snow in the deep ocean, the bodies of old plankton rain down and over time it forms thick layers of ooze. this can be up to a mile thick. >> a mile thick? >> it's not likely we're talking about a thin veneer. this is thousands of feet of thick, sticky ooze, a mix of clay. >> i had a twitter question earlier and i couldn't answer it and now i can because you can. with the pressure and depth, does the ooze ever get exacted? >> not in the same way because water supports things at that depth and that's why it's unlikely that any wreckage would sink completely into the ooze. the pressure is still incredibly

pervasive but it's not like quick sand. >> i think the two hour ping and 13 minute ping can be described as cutting of pizza. if you cut it slowly through the middle. if you just nicked the crust on the very edge you would only take 13 minutes through that little part. where it's a long drive through and a short drive through. they need to go back to the long drive through to get the triangulation. >> the last two pings a matter of minutes. come back any time. >> i love talking about ooze with you. >> it's a real thing. it could be a mile deep. i had no idea. and we will continue our coverage in a minute but first more on our breaking story. 20 people injured at a stabbing ram passenger at a high school. we will hear more about the victims, their stories and the

heroes who swooped in to help. stay tuned. ♪ [ male announcer ] even more impressive than the research this man has at his disposal is how he puts it to work for his clients. morning. morning. thanks for meeting so early. come on in. [ male announcer ] it's how edward jones makes sense of investing.

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16-year-old teenager is in police custody, after a stabbing spree at a high school in a pittsburgh suburb. 20 people were hurt when police say the young man went from classroom to classroom down the hall, carrying two different knives, and stabbing anyone seemingly who got in his way. jean casarez following the attack since it happened this morning. what more are you learning about the young poem, aeople, ages 14 hit. >> right in the prime of high school. three of the students are going to be staying in intensive care tonight, going to be monitored all night and those are the three victims that went into surgery. now 11 victims were taken

originally to the university of pittsburgh medical center hospitals, and that would be four hospitals. we've heard some particulars about one, a 17-year-old, that a doctor at children's hospital described as receiving a stab wound to the left part of his lower torso, which seemed to be a pattern here, and that stab wound perforated his liver, major blood vessels. the doctor said the only reason he lived is that the knife did not go through his heart or aorta. he's currently on life support but they believe he will survive. >> and as they are struggling to do so, there are some stories emerging, this school resources officer who, did he slap handcuffs on the suspect? >> he is the one that apparently actually apprehended him but the security guard was finishing his overnight duties just about to go home and that's when the school resources officer called on the intercom phone that he have, saying we've good a problem. the security guard came, school

resources officer, a principal, and the security guard was stabbed in his torso, and he has been in the hospital. but it was the principal, it appears, as though, at leaf one of the principals, that subdued and then the -- then he was handcuffed, apprehended and taken to the police station. >> jean casarez, thank you. we've talked to a number of students, jake tapper, my colleague, will speak to a student who saw everything. stay tuned. switching gears to the plane, you have heard terms sonar, hydrofoam devices finding missing flight 370. next, on board the boat that has devices. we will show you what they are. explain how they work and how searchers are using them in the indian ocean.

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welcome back. i'm brooke baldwin. the possible major leads, two new sets of pings somewhere in the indian ocean. flight for search 370, a size of south carolina, four sets of pings here in yellow. since saturday, all within the 17-mile stretch of one another. ahead of the search effort is predicting they will find the plane or its wreckage very soon. he says additional data from the pings heard over the weekend strongly suggests they were not ocean noise but electronic signals. you see that red spot at tip top of the screen here? that's where they're searching now, evolution of the search since march. live to a boat, off the coast of santa barbara, california. there she is, stephanie elam back on a boat to do a demonstration, give us a better idea of what it is they're doing to find the plane. stephanie? >> reporter: right. right. brooke, we hear about the talk about pingers, right, what they do. i want to show you what a pinger

looks like. let me introduce you to james coleman. let's take a look at pinger, because it's smaller than i thought it was. >> an emergency locator beacon used in black boxes. this is the pinger sending out 37 1/2 kill low hertz sound. >> this is what's picking it up, right? these are hydrophones. >> different examples of hydrophones. come in all shapes and sizes, underwater microphones, used in a pinger locator to pick up that pinging sound. >> reporter: when it picks it up, it doesn't know were the ping is coming from? >> no, detecting the sound. doesn't know if it came from here or there detects the sound. the sound gets louder as you go that way, softer as you go that way, to localize the sound. >> let's go inside and take a look at what the sound can look like, how we can map it on top of it as well. >> i have a hydrophone in water as well. you can hear the once per second

click coming in that's the sound of the pinger. you can have a visual representation of it. so, what we see here is the frequency that the sonar's picking up or hydrophone is picking up in the water and there's energy in a band. if you're looking for the underwater locator beacon, you would make sure that's in the 37 kill low hertz band. they're looking at right sound the. >> reporter: other thing they're doing is side scan sonar, that can see more what's underneath the boat, right? >> right. this is done in stages. we've done the stage of isolating the rough area, we want to get an image of what happens down there, they'll use side scan toner. it's sending out pings and looking for images of objects on the sea floor. a couple of objects are beginning to show up as we go over the debris field. that's what we're detecting wit the scan. >> reporter: after you do that you take this data, you're able to map it. what would that look like? >> right, right. as i said, we're doing this in stages. >> right. >> progressively getting more

and more detail. they'll mow the grass, as we say. keep going back and forth, building up a map. here's data that we already collected earlier today. as we're going along, recording more data. it's a higher level of detail than what we were looking at. they have a myriad of tools as they get more and more detail on the wreck site. >> reporter: if you figured out where that debris field was, if you're looking for that and you found that, you would do this to map out where the bigger pieces are, how to pull those up? >> right. progressively working more detail until able to get camera on all different pieces down on the sea floor. with the pinger locator, we've mapped out the general area with the side scan, more detail here and eventually optics. >> reporter: amazing technology. it's detailed but as you can see, takes a long time to do it as well. >> i see that. thank you so much. each sort of level of searching and of course the different pieces, the different, you know, rovs, hovs, auvs using to deploy

in the search that's shrunk, based upon the possible pings of 17 miles. . let's hope for the sake of the families they find it. i'm brooke baldwin. "the lead" with jake tapper starts right now. >> what could have driven a student to allegedly stab 20 people at his high school? officials could have more answers for us in the news conference coming right up. i'm jake tapper. this is "the lead." blood all over the floor. >> the national lead, police say they stalked the halls, classrooms, two knives in his hands. 20 people, almost all students, were clutching stab wounds. many of them serious. a 16-year-old under arrest while his alleged victims fight for their lives. the world lead, when the most promising lead has been lost, the trail is hot again. fresh