Transportation security

Train approached curve at 106 mph, twice the limit

The Amtrak train that derailed here Tuesday night was traveling 106 mph, more than twice the authorized speed, as it approached a sharp bend in the tracks, the National Transportation Safety Board said Wednesday. The engineer applied the emergency brakes, but the action was too late. The train was still moving at 102 mph when it hit the curve about three seconds later and the engine and all seven cars derailed.