A Black Hawk helicopter can transport up to "12 fully equipped, seated troops in combat," according to Lockheed Martin, the weapons company that builds the helicopter. There are about 5,000 of these helicopters in use by the United States Military.

The UH-60 Black Hawk is the helicopter involved in a crash with a passenger jet on Wednesday night near Reagan National Airport in Washington, D.C.

An American Airlines regional passenger plane with a seating capacity between 66 and 78 collided with a helicopter near Ronald Reagan Washington National Airport in Washington, D.C., on Wednesday, Jan.

Military spokesman Ron McLendon II said the Army is joining an investigation into the crash headed by the National Transportation Security Board.

The American Airlines Bombardier CRJ700, carrying 60 passengers and 4 crew, collided with a Sikorsky UH-60 Black Hawk helicopter, which had 3 occupants.

“CPI Aero has delivered over 6,000 of these gunner window assemblies to Sikorsky since 2010 ... on this critical program in support of the Black Hawk helicopter fleet,” stated Dorith Hakim ...

Dozens are feared dead after a passenger plane collided midair with a Black Hawk army helicopter and crashed in the Potomac River near the Ronald Reagan Washington National Airport outside of Washington,

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.

A massive search operation is now focused on the nearby Potomac River after both aircraft plunged into the freezing water.

The plane collided with a helicopter just before it was scheduled to land. This is a developing story and will be updated.

None are believed to have survived the Wednesday night collision, which caused both aircraft to plunge into the frigid Potomac River.