To experience the rugged splendor of the american west, including major portions of the lewis and clark trail. at around 4:00 p.m. mountain time on saturday near joplin, montana, the idyllic scene turned to tragedy. >> it was probably 10 or 15 seconds of rocking back and forth and tons of noise. and then we came to a stop. >> reporter: megan vandervest was taking a nap in one of the front sleeper cars that did not derail. amtrak said there were approximately 141 passengers and 16 crew members. the train had two locomotives and ten cars in total, eight of which derailed. >> i would describe the...