The incident occurred shortly after 2:30 p.m. as Mr. Trump was flying to Joint Base Andrews from the White House on the initial leg of a planned trip to Los Angeles.
Before taking off, the crew of Marine One the call sign of the helicopter that carries the president made three attempts to warn controllers in the National Airport tower that they were three minutes away from taking off, according to audio recordings posted on ATC.com.
The communications appeared not to have been heard by the controller, and the helicopter advanced. That put it in the flight path of an Envoy Air passenger jet, a haunting situation after a tragic collision between a military helicopter and a passenger jet in the Washington airspace last year.
