Officials say the conditions of the Potomac River are complicating recovery efforts of the bodies of the 67 presumed dead in a mid-air collision between American Airlines flight 5342 from Wichita and a military Black Hawk helicopter.

Darkness has now fallen once again over the Potomac River making this already difficult recovery mission more challenging. Boats remain in the water at this hour and we're told about 50 members of the NTSB are out.

The crash and rescue on the icy river connecting Washington, DC and Virginia had similarities to this one. Five of the 79 aboard the flight survived.