navy midshipman on leave. the crash occurred along the nation's busiest rail corridor with more than 2,000 trains every day. amtrak has modified its schedule with service shut down entirely between new york and philadelphia for what may be days to come. joining me now from near the crash side is msnbc's adam reese. thanks for joining me. we're hearing this preliminary data from the ntsb that the train was traveling over 100 miles per hour. what is the latest on the developing story? >> reporter: they won't confirm that, but they are telling us they are working on two parallel tracks. we know what happened but we're not sure exactly why it happened. the other is making sure the manifest matches with people who were on the scene, on the train, who might have gone to the hospital, who might have walked away from the crash, or who might not have even been on the train at all. the ntsb has the black box. it was taken to amtrak headquarters in delaware.