Crash investigators looking at altitude, communication and staffing before helicopter collision with plane
How an Army Black Hawk helicopter collided into an American Airlines jetliner in a deadly crash over the Potomac River ...
D.C. Plane Crash Live: NTSB to Hold Briefing on Midair Collision Investigation
Black boxes recovered after a jet and Army helicopter collided near DC; 14 still missing as NTSB investigates the deadly ...
What We Know So Far About the Victims of the D.C. Plane Crash
With officials saying no one has survived the crash, efforts have since shifted to recovering bodies in Potomac River.