US House Appropriations Committee says there are conflicts between what NTSB and Amtrak said about positive train control systems at site of Philadelphia derailment; NTSB said systems were not installed and Amtrak said they were installed, but not turned on - @ChadPergram
Sen. Charles Schumer, D-NY, on Philadelphia train derailment: 'It is simply a fact that insufficient funding for Amtrak has delayed the installation of' positive train control systems - @ChadPergram