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.

Divers are expected to return to the Potomac River as part of the recovery and investigation after the United States’ deadliest aviation disaster in almost a quarter century

Residents and visitors were told to not touch or remove debris from the Potomac River, as the investigation into the midair D.C. plane crash remains ongoing.

First thing is the communication between the air traffic control and the helicopter and the plane … There’s no direct communication between the civilian and the military helicopter and airplane. Instead,