train traveling from seat toll chicago. images of the scene show toppled cars and people gathered around the tracks. authorities say eight out of the ten cars were derailed. the crash happened in a remote area near joplin, montana. that is about 30 miles from the canadian border. let s goat cnn aviation and transportation correspondent pete munteen. a team of federal investigators headed to the scene to figure out what happened. what do we know so far about some of the condition surrounding this derailment? reporter: the big question is why did this happen? a tragic end to what was supposed to be a beautiful trip, only about half over. amtrak is deeply saddened three people died in this incident. 141 passengers on board and 16 crew, and amtrak now says passengers and crew were among the injured. this all happened about 4:00 p.m. mountain time on saturday. two locomotives, ten cars in