Sixty-seven people died in a collision between a Bombardier CRJ700 regional jet operated by PSA Airlines and a military Black Hawk helicopter.

The black boxes are the nickname for the flight data recorder and cockpit voice recorder that record events during a flight.

Recovery crews are set to use a massive crane Monday morning to lift wreckage from the Potomac River, days after a tragic midair collision between a plane and a helicopter left dozens dead. Authorities have now identified 55 of the 67 victims,