run of this, this service. but we want to check and make sure what that exactly means. >> reporter: an ntsb official tells cnn the investigation will focus on recovering the train's data recorders, to determine the train's speed. they'll also examine the tracks and signals and conduct extensive interviews with the crew and passengers. >> we went down an embankment. we had to kick out the window -- the emergency window. >> reporter: and while no one knows for sure what caused this crash, just two weeks ago, the mayor of lakewood, washington, warned state transportation officials that the tracks were not suited for high-speed rail travel, saying, come back when there's that accident and try to justify not putting in those safety enhancements, adding, this project was never needed and endangers our citizens. the last major amtrak crash was just 2 1/2 years ago in philadelphia, when amtrak 188 from washington, d.c. to new york city derailed, killing