Investigators trying to determine why an Air France jet skid off a Toronto runway revealed Saturday that only four of the aircraft's eight doors and emergency exits were used to escape the burning jetliner. Real Levasseur of Canada's Transportation Safety Board also told reporters that two of the slides used by the 309 passengers and crew to madly disembark didn't work properly, even though they are supposed to unfold automatically when the emergency doors are opened, according to AP.
