Emergency teams will continue efforts to retrieve the bodies of those who died when a passenger jet and helicopter collided.

Air crash investigations can take months, and federal investigators told reporters they would not speculate on the cause.

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.

Part of the wreckage is seen as rescue crews search the waters of the Potomac River after a passenger plane on approach to Reagan National Airport crashed into the river after colliding with a US Army ...