There, this is quite the undertaking. Reporter yeah and it is still busy right now. Were perched up on top of a roof to give you a good idea whats happening right now. There are workers gathered at the end of the street. The tracks are just beyond that. If we pan over, see a crane up on top of the Railroad Tracks and its been moving around trying to pick up those rail cars and while a lot of those rail cars and debris are gone the workers and broken up tracks remain. Amtrak hopes full Passenger Service will resume tuesday between philadelphia and new york, but there is a lot of work to do. We know that we have a team here that worked together to help us. Reporter today investigators used 3d laser scanners on the wreckage to help paint a better picture of what happened here. It takes several hours per rail car to complete. Our investigators have a lot of experience dealing with this. Each accident is unique. Reporter 11 million riders pass through the northeast corridor of track each ye