The last major collision of a commercial U.S. airline dates back to 2009, when a Colgan Air incident left 50 dead near Buffalo, New York. Federal regulators tightened safety requirements following the crash, including bolstering aircraft carrier inspection requirements and pilot training hours.

An American Airlines jet and an Army helicopter collided over Washington, D.C., Wednesday night. All 67 people aboard the aircraft are presumed dead.

The pilots of the American Airlines plane that collided with a U.S. Army helicopter late Wednesday night have been identified. Jonathan Campos, 34, was the captain of American Airlines Flight 5342 when an Army helicopter apparently flew into its path as it prepared for landing at Ronald Reagan National Airport near Washington,