>> toure, good afternoon, back on track here in philadelphia. service resumed early this morning. mayor nutter was here seeing people off to new york telling them this is a safe and secure way to travel. now, as far as the investigates, the ntsb says their investigation is wide on the floor. the fbi, on the other hand looking at a pattern. there? fact a link between three trains hit by projectiles. you have a septa, and others. engineers called this getting rocked. it happens so often along the northeast regional corridor that some of them actually put up window guards to protect them from these kind of projectiles. >> adam reece in philadelphia, thank you for that report straight ahead prosecuting crime in america's largest city.