The official description
A U.S. military operator reported observing a UAP, describing it as “look[ing] like a balloon.” The report describes the UAP as “traveling with the winds at approximately 31,000 ft.” The visually tracked the UAP via onboard infrared sensor.
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.