On that departure … was there an actual aircraft about 500 ft below us as we came off of DCA?” the Delta pilot asked air traffic control, according to audio captured by LiveATC.net as first reported by CNN.

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.

"Was there an actual aircraft about 500 feet below us?," a pilot can be heard asking air traffic control in audio obtained by WUSA9.