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.

Readings have been compared from the black box recovered from American Eagle flight 5342 and the air traffic control tower about the Black Hawk helicopter

The Unified Command said all 67 victims of the American Airlines and Black Hawk helicopter collision have been recovered and identified.

Recovery for American Airlines plane crash victims continues after collision with helicopter Watch live from the scene on the Potomac River where recovery efforts continue after an American Airlines regional passenger jet with 64 people on board and a U.

All 67 victims have been recovered from the Potomac River following a deadly mid-air collision between an American Airlines plane and a military helicopter. 60 victims were passengers aboard American Airlines flight 5342.