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

Search and rescue is underway after a military helicopter collided with a commercial airplane midair before crashing into the Potomac River early Wednesday night near Washington D.C.'s Reagan National Airport.

Continental Airlines Flight 3407 crashed into a house in Clarence Center, killing everyone on board the plane.

WASHINGTON (Reuters) – An American Airlines regional passenger jet and a U.S. Army Black Hawk helicopter crashed into the frigid Potomac River after a midair collision near Reagan Washington National Airport on Wednesday night, officials said.

The midair collision over the Potomac River on Wednesday brings back chilling memories of another tragedy in the same waters more than four decades ago—when Air Florida Flight 90, bound for Fort Lauderdale-Hollywood International Airport,

WASHINGTON (Reuters) -Scores of people were feared dead after an American Airlines regional passenger jet carrying 64 people collided with a U.S. Army Black Hawk helicopter and crashed into the frigid Potomac River near Reagan Washington National Airport.

A devastating mid-air collision between a commercial airliner and a U.S. Army helicopter sent both aircraft crashing into Washington’s Potomac River on Wednesday night, killing all 64 passengers and crew on the jet.

The Federal Aviation Administration’s website boasts that the U.S. has the world's toughest qualifications for airline pilots.

The collision between a passenger flight and an Army helicopter near Washington, D.C., on Jan. 29 marks the first fatal disaster involving a U.S. commercial airliner in 16 years.

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.