The official description
While conducting a weapons calibration test, U.S. military operators reported observing a lens flare via MX-20 and MX-25 IR sensors after firing an AGM-176 Griffin air-to-surface missile. The operators described the source of the flare as a UAP moving through the aircraft’s sensor’s field-of-view at a high rate of speed. The reporter assessed that the flare was associated with “a significant heat source.”
Quoted from the U.S. Department of War, PURSUE UAP releases. Read every file for this incident in Official files or at war.gov/UFO.