Q&A: A look at the investigation of a train derailment

Investigators are looking into the derailment of a passenger train early Monday in western Kansas. Here's a look at where the investigation stands: WHAT CAUSED THE DERAILMENT? Authorities say they are still investigating the derailment of Amtrak's Southwest Chief train along a stretch of track near the rural community of Cimarron. Earl Weener, a member of the National Transportation Safety Board, said Tuesday that a feed truck belonging to Cimarron Crossing Feeders LLC hit the section of track, shifting a rail about a foot before the train derailed. He stressed, though, that...