The midair collision that killed 67 near Washington and the fiery plane crash in Philadelphia and a plane crash in Alaska that killed 10 are only the most high-profile disasters.
NTSB investigators said that the American Airlines crash that occurred in January was possibly caused by two major technical mishaps.
Investigators say the crew of the helicopter that collided midair with an American Airlines jet near Washington D.
New data revealing factors that potentially led to the deadly crash on January 29 has been recovered from the Black Hawk helicopter's black box.