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.

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.

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.

“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 ...

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.

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

A timeline of the D.C. plane crash on Jan. 29 details the moments before and after an American Airlines passenger flight and Army helicopter collided over the Potomac.

An American Airlines regional passenger jet carrying 64 people crashed into Washington DC's Potomac River on Wednesday after colliding mid-air with a US Army Black Hawk helicopter near Reagan National Airport.

A regional jet approach ing Reagan National Airport collided with a military helicopter over the Potomac River late Wednesday night, prompting a massive search and rescue operation.