in both cases the n.t.s.b. believes available collision avoidance systems could have prevented the crash. >> traffic. >> reporter: by giving warnings like these. they are not required in general aviation aircraft, but similar systems are required for commercial airliners. rusty aimer is a retired airline captain. >> i must have had in my career at least five or six of those warnings that saved us. have been 44 midair collisions in the u.s., killing 46. mark rosenker is the former head of the n.t.s.b. >> these are very deadly accidents. that's why when you can use this kind of technology to prevent them from happening, it is a simple decision to go out and install it. >> reporter: starting in 2020, all general aviation aircraft will have to have new technology to better communicate with air traffic controllers, but, scott, those systems stop short avoidance. >> pelley: kris van cleve for us tonight. kris, thank you. coming up next on the "cbs evening news," jon stewart's first interview since the election. plan i

. >> reporter: today, the n.t.s.b. said it was looking into why walker was not driving on a designated bus route. he is being held on vehicular manslaughter charges while investigators review video and black box recordings from the bus and look into other possible factors, like excessive speed. investigators are also looking into claims some parents had complained about walker's driving in the past. while he has no previous criminal history, records show he was in a minor accident while driving a school bus two months ago. walker was hired by a private contractor, durham school services. c.e.o. david a. duke released this video statement today. >> my responsibility now is to look for answers, answers about why this tragedy occurred, and answers for how we can make sure >> reporter: the crash has left this community deep in mourning. lafrederick thirkill's nine-year-old cousin, cordayja jones, died in the crash. what has this community lost? >> oh, this community has lost some beautiful spirits, some beautiful angels, so

the n.t.s.b. i knew this was unprecedented and illegal. the n.t.s.b. was set up to be independent and at that point they sacrificed their independence and they yielded to the fbi. now, what vernon gross or no one know at that time some other insertion was on the very first day and this we know from the whole treasure trove of cia documents we've unearthed. here with is what we know. according to their documents, the di, that's the director of intelligence, became involved in the missile theory the day after the crash occurred. the cia has absolutely no business being involved in this kind of event, especially since the year before, in 1995, the department of justice sent out a memo often known as the wall memo. and what the wall memo says is that there's a wall between the intelligence gatherers in the ceo and the criminal investigators in the fbi and never the twain shall meet. it cannot collaborate because it would violate people's rights, who knows. and george tenet in 2004 at that point was th

deborah hersman is the former headline of the n.t.s.b. >> we put up with, in a permissive way, people talking on the phone, people texting, even though 46 states have laws banning texting. >> reporter: in the first half of 2016, more than 17,000 people died in accidents. that's up 10.4% over last year. a.a.a. expects 43.5 million american to drive 50 miles or more this thanksgiving weekend and the national safety council grimly predicts 437 will die in >> we're raising speed limits. we're repealing helmet laws. we make decisions here in this country that actually allow more fatalities to occur, and then we question why the number is rising? >> we have an immediate crisis on our hands. >> reporter: national highway traffic administrator mark rosekind. >> we've known distraction is a problem all the kind. people are just sneaky you know where they're just putting things below visual and still on their phone. so these are problems we know about that are clearly underestimated that are probably playing a big part in those injurieses. we just can't measure how much. >> reporter: drunk driv

. >> reporter: today, the n.t.s.b. said it was looking into why walker was not driving on a designated bus route. he is being held on vehicular manslaughter charges while investigators review video and black box recordings from the factors other like excessive speed. investigators are also looking into claims some parents had complained about walker's driving in the past. while he has no previous criminal history, records show he was in a minor accident while driving a school bus two months ago. walker was hired by a private contractor, durham school services. c.e.o. david a. duke released this video statement today. >> my responsibility now is to look for answers, answers about answers for how we can make sure that this never, ever happens again. >> reporter: the crash has left this community deep in mourning. lafrederick thirkill's nine-year-old cousin died in the crash. what has this community lost? >> oh, this community has lost some beautiful spirits, some beautiful angels, some students that made many people's liv

investigators from the n.t.s.b. are on scene. the school bus ended up on its side. the roof nearly split in half by a tree. a heart breaking scene. young children on their way home, killed. dozens of others injured when the driver swerved off the of those deaths, three in fourth grade. one was a first-grader: and one was a kindergartner. >> reporter: this morning, the bus was towed from the scene. in the early stages of the investigation, police say they are looking at speed as a strong factor in the crash. overnight, the 24-year-old bus driver was arrested. >> john thony walker is being charged with five counts of driving. >> reporter: of the 37 students onboard, 24 were rushed to the hospital. >> the most unnatural thing in the world is for a parent to mourn the loss of a child. report@tragic loss just days before the holiday. >> we certainly send our condolences to the parents of those children. my daughter tries school bus every day. i understand that. we will do everything we can to try to prevent this from happening again. >> reporter: investigators also have

. >> jennifer: christa, a team from the nets n.t.s.b. is heading to the scene. the bus driver is facing several charges, including five counts of vehicular homicide. as families in chattanooga mourn, this scene is etched into their minds, a mangled school bus on its side wrapped around a tree. the emergency call went out at about 3:30 monday afternoon. >> a school bus flipped off the roadway. there are children. they believe there are ejections. >> jennifer: the bus had 35 students on board, ranging from kindergarten through fifth grade. >> i can see an arm moving, but i don't know if anybody can get to it. >> jennifer: 24 children were rushed to the hospital. police questioned the bus driver and overnight announced he's under arrest. johnthony walker is being vehicular homicide. >> jennifer: one of the children on that bus talked about the driver. >> he wasn't paying attention. he was going real fast. and he had hit a guardrail and a mailbox and then we flipped over and hit a tree. >> jennifer: the community asking for prayers. >> a bus accident with multiple i

investigators say johnthony walker was driving recklessly, well above the posted speed n.t.s.b. chairman christopher hart: >> we want to make sure that the brakes were working, that the steering was working. we want to find anything that wasn't working. >> reporter: hours after the crash, parents searched for missing kids. we spotted quadir mateen. three of his daughters were on the bus. two were hurt, but one, six- year-old ziara, was missing. >> she was trapped between a saw mateen at the hospital looking devastated. he had just learned that ziara was among the children killed. jasmine mateen is their mother. >> angry. hurt. she wanted to be a doctor. and now my baby can't be that doctor that she wanted to be. >> reporter: mateen told us for three months, she has complained to school officials about walker's driving. walker has no criminal record, but his driving record shows his license was suspended in 2014 for a lack of insurance. and two months ago his bus swiped a car, causing minor damage to both vehicles. mateen made serious allegations concerning walker and yesterday's

the wreckage. however, investigators are painting a very different n.t.s.b. officials reviewing the mangled bus after five schoolchildren were killed in chattanooga, tennessee on monday. six others were critically hurt. police arrested the driver johnthony walker, now charged with five counts of vehicular homicide, reckless endangerment, and reckless driving. his mother says he called her moments after the crash. >> i love you. bus driver's license in april and was involved in a minor bus crash in september. no one was hurt in that incident. a much different situation than what happened on monday. mourners gathered tuesday night for a candlelight vigil. the crowd so large, not everyone could fit inside the church. this, as parents grapple with the unthinkable. >> none of them kids deserved this. none of them. my baby had a whole life ahead of her. i will be there. because that was my only child that he took from me. >> nancy: the arrest warrant says he was driving well above the posted speed limit of 30 miles per hour. nancy chen, 7 news. >> kris: south caroli