Buried in the Defense Intelligence Agency’s archive in an unnamed file is one of the most fascinating accounts of pilot interaction with UFOs. This document, sent to the CIA, NSA and White House in 1976, details an encounter between Iranian Air Force pilots and multiple bright, flashing objects that performed impossible maneuvers.
A review later declassified by the NSA shows the pilots’ accounts were verified by a high-ranking general, radio tower operators and radar signatures.
DoD message of event: https://www.nsa.gov/Portals/70/documents/news-features/declassified-documents/ufo/routing_slip_ufo_iran.pdf
USAF summary: https://www.nsa.gov/Portals/70/documents/news-features/declassified-documents/ufo/now_you_see.pdf