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

As recovery operations continue after the midair collision between an American Airlines flight and an Army helicopter, NTSB investigators say they have recovered the two black boxes from the plane and have searched "all accessible areas" of the Potomac River.

Investigators have recovered the flight recorders—also known as black boxes—from both the commercial jet and the military helicopter involved in the mid-air collision near Reagan National Airport in Washington,