Latest news and live updates after a Black Hawk helicopter collided with an American Airlines jet over the Potomac River this week, killing 67 people.
Here's what we know about Ryan Austin O'Hara, one of the soldiers aboard the helicopter presumed dead in Wednesday's crash.
The directive from the FAA included a sharpened focus on the risks and dangers of the jumble of aircraft sharing the crowded airspace near National Airport.
There were 64 passengers aboard the plane, and three Army soldiers in the helicopter, according to officials. Here's a look ...