An airspace cluttered with passenger planes and military aircraft. A history of near-crashes. And a growing shortage of air traffic controllers available to manage it all. Some experts, politicians and airport managers have been warning for years of the risks posed by the crowded airspace and volume of flights at Ronald Reagan Washington National Airport (DCA).

Before the additional flights were approved, a senator warned that the increase could heighten the risk of collisions.

It is being reported that staffing was “not normal" in the air traffic control tower at Washington Reagan National Airport during the time of the deadly plane crash on Wednesday night.