NTSB: Amtrak derailment in Vermont caused by rock-slide debris
http://www.progressiverailroading.com/federal_legislation_regulation/news/NTSB-Amtrak-derailment-in-Vermont-caused-by-rockslide-debris--51906
http://www.progressiverailroading.com/federal_legislation_regulation/news/NTSB-Amtrak-derailment-in-Vermont-caused-by-rockslide-debris--51906