An American Airlines regional jet collided with a U.S. Army Black Hawk helicopter on Jan. 29. Both aircraft plunged into the Potomac River near Reagan Airport.

The Army Corps said it is first salvaging the jet — which still is believed to have bodies in it — and afterward, it will recover the fallen Black Hawk.

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