Sixty-four people aboard a commercial airliner died Wednesday night after it collided with a military helicopter midair near Reagan Washington National Airport. Both the American Eagle jet and Army Black Hawk are in the Potomac River.

Here's what we know about Ryan Austin O'Hara, one of the soldiers aboard the helicopter presumed dead in Wednesday's crash.

The Army Black hawk helicopter that collided with a passenger plane near Washington, D.C., was drilling mysterious 'continuity of government' plans.