Four jets came close enough to the Delta flight, which was taking off from Washington’s Reagan National Airport, to set off a collision-avoidance alert.

The passenger jet was cleared for takeoff on Friday afternoon while four T-38 Talons were inbound to Arlington National Cemetery for a flyover.

A Delta Air Lines flight had a reported close call Friday with a U.S. Air Force jet near Ronald Reagan Washington National Airport. CNN first reported the close call between the Airbus A319 that was departing Reagan and an Air Force T-38 jet, which is often used for training.