Crews spent the weekend positioning cranes and other key equipment following last week's deadly plane crash near Washington, D.C.

The Army Corps of Engineers is expected to begin removing wreckage following the deadly collision of an Army helicopter and a passenger plane.

Recovery crews used 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,