Authorities are combing the Potomac River for a second day in search of victims and more clues behind the deadliest U.S. air crash in over 20 years.

Responders are working to recover the victims of Wednesday night's midair collision over Washington, D.C. It could be the deadliest crash to occur in U.S. airspace in at least 15 years.

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

Sixty-seven people died in a collision between a Bombardier CRJ700 regional jet operated by PSA Airlines and a military Black Hawk helicopter.

By Trevor Hunnicutt, David Shepardson and Jeff Mason WASHINGTON (Reuters) -Scores of people are feared dead after an American Airlines regional passenger jet and a U.S. Army Black Hawk helicopter collided and crashed into the frigid Potomac River near Reagan Washington National Airport on Wednesday night,

A small American Airlines jet collided with a Sikorsky H-60 military helicopter on approach to Reagan Washington National Airport and crashed in to the Potomac River on Wednesday night.

In 1982, Air Florida Flight 90 crashed into the 14th Street Bridge over the Potomac River, killing 70 passengers and four crew members. Only four passengers and one crew member survived.

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.

ALBAWABA - A tragic midair collision between a commercial passenger jet and a U.S. Army Black Hawk helicopter sent both aircraft crashing into the Potom

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.

By David Shepardson, Trevor Hunnicutt and Brad Brooks 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,

The Washington Metropolitan Council of Governments is urging area residents to report anything they might find related to Wednesday night's midair collision over the Potomac River that killed 67 people.