Nbcs sarah dalof starts our coverage tonight. Reporter on the first day of a newly established route monday morning, tragedy aboard amtrak 501. Things started to tip over and as it was going around and then all of a sudden just ended up on side, and everything went dark and stuff started flying around and that was it. Then it stopped. Reporter a stunned motorist watched the train derail. One car falling to the interstate below, another dangling from the overpass. I was right in front of it really. Nerve racking, kind of sick to your stomach after seeing this right now. Reporter multiple vehicles were hit by the falling train car as others came crashing into the pile. The people that were in all the vehicles, even though when you see the pictures, its pretty horrific. At this point nobody in any of vehicles was fatal. Reporter 77 passengers and five crew members were on board the train which was headed south from seattle to portland. Witnesses scrambled trapped survivors and help emerge