If changes aren't made, that near-miss becomes a mid-air collision,” one aviation safety expert said. “Unfortunately, that's what we had last night.”

An American Airlines jet carrying 64 people collided Wednesday with a helicopter near Reagan Washington National Airport, with no survivors expected.

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.

Flight operations not expected to resume until late Thursday morning, at the earliest, at Reagan National airport after plane crash Wednesday night.

As the American Eagle Flight 5342, a CRJ jet, approached the helicopter, the tower controller asked the helicopter pilot if he had the CRJ in sight. The helicopter pilot cannot be heard responding to the question before the two aircraft collided.

Political leaders had warned about the dangers of Ronald Reagan Washington National Airport in Washington, D.C. months before an American Airlines flight collided with a U.S. Army Black Hawk helicopter on its approach to the airport.

The airport has resumed flight operations after a deadly crash involving a passenger jet and military helicopter halted all arrivals and departures.

An airplane collided with a helicopter while trying to land at the Ronald Reagan Washington National Airport on Wednesday night, officials said.

American Eagle Flight 5342 en route from Wichita, Kansas (ICT), to Washington, D.C. (DCA) was involved in an accident at DCA. Rescue operation is underway and US President Donald Trump has said that t

Democratic California Rep. Norma Torres is doubling down on holding President Donald Trump responsible for contributing to the fatal aircraft

An Army Black Hawk helicopter collided with a regional jet near Ronald Reagan Washington National Airport on Wednesday evening, U.S. officials confirmed to ABC News.