Pilots who land at Reagan National face a unique set of complications, including short runways, scores of helicopters and a mountain-size no-fly zone.

Aerial view of Reagan Washington National Airport after plane crash Live aerial views of Ronald Reagan National Airport after a midair collision between an Army helicopter and a jetliner killed all 67 people aboard both aircraft,

The airspace where a deadly mid-air crash between a passenger plane and a U.S. Army Black Hawk occurred late Wednesday night is one of the most complex and congested in the country. Officials expect no survivors from the crash,