at a greater rate of speed in that section of the track. it is a big controversy that the system is not in place in the northbound section. ntsb officials say if it had been this accident would not have occurred. christine. >> brian todd for us. thank you. friends and former colleagues of the engineer brandon bostian are speaking out in his defense. xavier bishop worked as his flagman until bishop was fired for attendance issues. he says he has never seen bostian take a drink or drive a train we he wasn't ready. >> if there was something he did not know he knew who to call to get information. he did not come off as i know it all or he knew everything. he knew what he needed to know. if he wasn't 100% sure he would call and make sure he got the