FILE - This Dec. 12, 1985, file photo, shows the wreckage of Arrow Air Flight 1285 after the plane crashed in Gander, Newfoundland, killing all 256 passengers and crew on board. The plane crash was among Canada's deadliest accidents in the last 150 years, killing 256. Police say 50 people are presumed dead following a July 6, 2013, fiery oil train crash in Lac-Megantic, Quebec, making it Canada’s worst railway crash in nearly 150 years. (AP Photo, File)