Investigators trying to determine what caused last week’s deadly midair collision between a US military Black Hawk helicopter and an American Airlines plane near Washington, DC, briefed lawmakers Thursday on what they’ve learned after combing through data from both aircraft and air traffic control.

A 3-D model created by The Times visualizes the helicopter pilots’ field of view minutes before a fatal crash with a jet in Washington.

All of the "major" pieces of wreckage from the collision between a Black Hawk helicopter and American Airlines Flight 5342 have been cleared from the Potomac River, officials said.

Investigators with the National Transportation Safety Board (NTSB) are examining the wreckage after an American Airlines plane and Black Hawk helicopter collided midair near Reagan National Airport (DCA),

Officials have said 'all major pieces' of the American Airlines plane and Black Hawk helicopter that collided in Washington, DC, have been recovered and will now be examined

The wreckage of the Black Hawk helicopter that collided with an American Airlines plane over the Potomac River in Washington DC has been removed from the crash site and is being examined by the National Transportation Safety Board.