Topic: Fort Totten
About $50 billion in backlog repairs is needed for rail transit systems, but just $5.6 billion was spent in 2006, according to one report.
Among the other new clues about Monday's accident: Marks on the rail tracks could suggest braking.
Communications and coordination in D.C. area were smooth, akin to rescue after Hudson plane crash.
Federal officials had warned Metro about that type of train and say it is 'unacceptable' that it hadn't been retired or improved.