brandon was always much more quiet, soft spoken, very caring when he spoke to people. very considerate of other people s feelings and interactions he would have. bostian graduated from the university of missouri in 2006. he became an amtrak engineer four years after landing a job as a conductor. and the accident now raising more questions about the safety of america s railways because get this, there s actually technology out there available that could have stopped this crash. that s what investigators tell us. why wasn t it on the track. matt gutman show us this hi-tech system. the troubling images of another train derailing. ten cars spilling off the track in pittsburgh. in south carolina, this train on truck collision and in wisconsin a locomotive catching fire. no one was hurt but they re reminders of tuesday s deadly accident in philadelphia which the government says could have been prevented with existing technology called positive train control or ptc.