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.

The U.S. Federal Aviation Administration is indefinitely restricting helicopter flights near Washington Reagan National Airport after a deadly collision between an American Airlines regional jet and Army Black Hawk killed 67 people.

The Federal Aviation Administration will restrict helicopter traffic around Washington, D.C.'s Ronald Reagan Washington National Airport after the fatal collision of Army Black Hawk helicopter with an American Airlines jetliner earlier this week,