No survivors are expected after an American Airlines passenger flight and a U.S. Army Black Hawk helicopter collided midair on Wednesday night, near Washington D.C.'s Reagan National Airport. The big picture: While the cause of the crash is being investigated,

Officials believe that all 67 people aboard an American Airlines flight and an Army helicopter were killed when the two aircraft collided in midair while approaching Washington’s Reagan National Airport Wednesday night.

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.