In the three years before the deadly collision between an Army helicopter and an American Airlines flight near Reagan National Airport, at least two other pilots reported near-misses with helicopters while landing at the airport,

U.S. commercial pilot Rick Redfern was preparing to land at Reagan Washington National Airport about a decade ago when he spotted a bright red Coast Guard helicopter hovering about 50 feet (15 m) above the Potomac River.

Questions remain over the mid-air collision between a jet, which was carrying 64 people, including the crew, and a military helicopter carrying three soldiers