i want to go to cnn's pam brown, tom foreman, james "spider" marks. pam, what do you know about the shooter in this incident? >> reporter: what we can tell you, what we're learning from sources, don, is that the shooter used a semiautomatic hand gun. so it's believed he used a hand gun. atf agents have been on the scene, so they'll be looking at how that hand gun was obtained. so it's an ongoing investigation. we're learning from sources, don, that the shooter here was wearing combat fatigues. perhaps that is why the initial belief at the early stages of this investigation is it was a soldier on soldier incident, that this started between two soldiers. again, as you mentioned, it's believed that the suspect is dead. so at this point, if there's been official all-clear at ft. hood at the scene, fbi agents have teamed up with law enforcement there, going building to building. it was on lockdown for several hours. there has been an official all-clear. now it's up to investigators to collect intelligence and piece together who the shooter was. >> pam, the

. >> cnn correspondent pam brown joins us live from murrysville with the latest.amela have the police released new information on the suspect? >> reporter: well, jake, by all accounts the suspect, 16-year-old alex hribal was a student who kept to himself and had no prior run-ins with the law. he is now charged with a adult, charged with four counts of criminal intent to commit homicide and 21 counts of aggravated assault. today, the district attorney spoke in court and said that hribal allegedly walked into school this morning and started stabbing people ind indiscriminately. >> i thought somebody had a nose bleed or something. somebody yelled somebody got stabbed. >> alex hribal used two kitchen knives. >> this is a nice young man, he has never been in trouble. he is not a loner, works well with others in school. >> there is no immediate word on the motive. fbi agents were seen following the attack at the suspect's home. >> what has been taken has not been forensically examined yet. as far as i'm told the subject did not have a cell phone. >> he was arraigned, ac

we have correspondent pam brown with more. >> reporter: chaos and tragedy this morning at franklin regional high school in murrysville, pennsylvania, police say a 16-year-old ran into the classroom on the horrific stabbing spree. >> i can tell you when we got there, there was a hallway pretty much in chaos as you can imagine. a lot of evidence and blood on the floors of the hallway. we had students running about trying to get out of the area. >> i was walking over towards the exit. and there was blood all over the floor. thought maybe somebody had a nose bleed or something. and someone yelled she got stabbed. >> area hospitals are treating victims for stab wounds to the chest, torso, and back, according to officials. >> i would say half of them are life-threatening. >> it could have been worse if not for those hailed as a heroes like one quick-thinking student. >> students who stayed with their friends and did not leave their friends. cafeteria workers who just automatically began to care for students who were bleeding. >> a security guard who helped to subdue the alleged attacker, the offi

and let me add one quick little point, pam brown talked about the simulator, and i have to say, and iy said. but to divert this airplane to some remote location is extremely easy for a pilot trained in that flight management system. so it wouldn't really take any practice. i wouldn't expect to find, you know, a diversion in the middle. indian ocean in this pilot's simulator. >> all right. steve wallace, former director of the faa's office of accident investigation. thanks for joining us this morning, steve. >> thank you, victor, christi. >> thank you, sir. much more on the search ahead. but we do want to talk about the fact that investigators say it's an argument that may have led to the ft. hood shooting. something else you may have been watching so closely this week. the big question, what is that argument about? >>> plus, a lot of kids will go out and have these chicken nuggets but there's a major recall you need to know about. when it comes to good nutrition, my daughter's an expert. hi dad. she's a dietitian. and back when i wasn't eating right, she got me drinking boost. it's go

brown circle around. >> pam: developing news. >> pam: happening now. that his father would not allow him to do so last sunday the teen survived a danger still awake trip inside the wheel well of an airplane that was and mali. the team is still in the hospital. >> catherine: divers off the coast of south korea are still retrieving bodies from the sunken ferry. roughly a hundred bodies are still trapped inside. this is the first image of the doomed ship april 16th -- taken from an oil tanker that was first on the scene >> catherine: calm seas belie the horrors unfolding inside the ferry. the crew of the tanker at first assumed evacuations were well underway. they were not. >> catherine: this video was taken by a student who did not escape his phone was retrieved with his body and given to his father. at first joking and unaware of the danger. >>he eventually becomes worried.and asks. 'why don't they tell us what's going on.they asked us to wear life jackets, does that mean the boat is sinking?" >> catherine: several times on the recording - we hear the a

with brown, graying hair and a pock- marked face. >> pam: bart is planning to replace its aging train showed off a mock- up of what they are calling 'the fleet of the future'. kron 4's maureen kelly talked to riders who got a glimpse. and she found. not everyone is on board. >> reporter:the new cars will be quieter.more high tech.and thankfully will have seats covered in a fabric that can be easily cleaned. many of the people who lined up to see the new design liked what they saw. >> reporter:but a contingent of the disabled community also got on board and voiced their concerns.which mainly has to do with this pole that is smack in the middle of each of the car's entry points. bites >> reporter:bart says they've already changed the design to shift the pole further away from the wheelchair area.which they believe gives the disabled enough room to manuever. people are crammed as much as it is rush are will make it 10 times worse. >> reporter:the transit agency's board president says they like the safety the poles add for those standing.especially when the trains stop and start. typicall

missing plane beneath the sea and on the surface, our justice correspondent pamela brown is following this part of the story. pamh efforts making it clear new underwater assets may be brought in as the search in the targeted zone wraps up soon. and while the bluefin hasn't found anything yet, australian officials say they will stay committed to finding this plane for as long as it takes. >> reporter: the subsea search of the six-mile radius area by the bluefin, considered the most likely crash site for flight 370 is more than 80% complete as investigators consider bringing in more assets to help under water, the air search hits a snag. for the second day in a row, bad weather grounded planes looking for floating debris. today the malaysian government appointed a formal team to determine the cause of the accident. >> it is imperative for the government to form an independent team of investigators, which is not only competent and transparent but also highly credible. as i've said since the beginning, we have nothing to hide. >> reporter: but malaysian authorities have chosen not to make public a preliminary report