There is an article in the Dallas Morning News today about 11 M1A1 tanks on flatcars rolling down a “slight” grade and hitting 5 BNSF locomotives, damaging all the tanks and the locomotives and destroying the siding connecting the Fort Hood railyards to the BNSF main. The railroad suspects “brake failure” on the flats.
http://www.dallasnews.com/sharedcontent/APStories/stories/D8DOVGQ82.html