Boats return to the Potomac River for DC plane crash recovery and investigation

abcnews.go.com:

Police boats have returned to the Potomac River as part of the recovery and investigation after the United States’ deadliest aviation disaster in almost a quarter century

ARLINGTON, Va. — Police boats combed the banks of the Potomac River on Friday morning, moving slowly and scanning the shoreline as part of the investigation into the midair collision that killed 67 people in the United States' deadliest aviation disaster in almost a quarter century.

More than 40 bodies have been pulled from the river as the massive recovery effort continued, two law enforcement officials told The Associated Press on Friday. The officials were not authorized to discuss details of the investigation and spoke on condition of anonymity.

Crews worked under overcast skies Friday morning with rain expected throughout the day. Planes continued to take off and land at Reagan National, with airport operations gradually returning to normal after a slew of canceled and delayed flights following the crash.

Investigators have already recovered the cockpit voice recorder and flight data recorder of the American Airlines plane that collided with an Army helicopter as the plane was landing Wednesday night at Ronald Reagan National Airport next to Washington, D.C. Officials are scrutinizing a range of factors in what National Transportation Safety Board Chairwoman Jennifer Hommendy has called an “all-hands-on-deck event.”

All aboard the two aircraft were killed, with officials examining the actions of the military pilot as well as air traffic control after the helicopter apparently flew into the path of the American Airlines jet.

Air crash investigations normally take 12-18 months, and investigators told reporters Thursday they would not speculate on