The National Transportation Safety Board says it has recovered a cockpit voice recorder and flight data recorder from the American Airlines plane that collided with an Army Black Hawk helicopter near Reagan National Airport late Wednesday.

Two of Reagan National Airport’s air traffic controllers were doing double duty Wednesday night, according to a government report.

According to a report by the FAA, one air traffic controller was working two positions at the time of the crash.

One air traffic controller was doing work normally assigned to two people in the tower at Reagan National when the collision happened, according to a report by the Federal Aviation Administration obtained by The Associated Press.