U.S. authorities said on Thursday it was not yet clear why a regional jet crashed into a U.S. Army helicopter at a Washington airport, killing 67 people in the deadliest U.S. air disaster in more than 20 years.

The Federal Aviation Administration in a statement said American Airlines Flight 5342, departing from Wichita, Kansas to Washington, collided around 9 p.m. midair while approaching the runway with a Sikorsky H-60 helicopter.

Three months before the fatal mid-air collision at Reagan National Airport, the Federal Aviation Administration launched an audit of near-misses at the nation’s busiest airports after a series of close calls that could have killed hundreds of passengers.

Multiple fatalities have been reported after a horrific incident involving American Airlines flight 5342 and a U.S. Army UH-60 Black Hawk helicopter over

A jet with 60 passengers and four crew members collided with an Army helicopter Wednesday while approaching the Ronald Reagan National Airport near

At least 28 bodies have been recovered after an American Airlines jet carrying 60 passengers and four crew members collided with an Army helicopter while landing at Ronald Reagan National Airport near Washington,

7:30 a.m.: Local and federal officials hold a news conference at Reagan National Airport, where they say that they do not believe anyone has survived the crash. Efforts are switching from rescue to recovery, they say, adding that 28 bodies have been recovered to this point.

A regional jet carrying 64 people collided with an Army Black Hawk helicopter. Reagan National Airport grounded all flights.

Staffing levels at the air traffic control tower at Ronald Reagan National Airport were "not normal for the time of day and volume of traffic," according to a preliminary report

Former Assistant Secretary of State Robert Charles revisits the inaugural messages of Ronald Reagan, Franklin D. Roosevelt and John F. Kennedy on Trump's inauguration day.

Without evidence, Trump blamed air traffic controllers, the helicopter pilots and Democratic policies at federal agencies for Wednesday night's collision.

An American Airlines jet carrying 64 people plunged into the Potomac River after colliding in midair with an Army helicopter on Wednesday night. Recovery teams had pulled more than two dozen bodies from the icy water,