But Kirkpatrick soon discovered that some of the obsession with secrecy verged on the farcical. A former Air Force officer was visibly terrified when he told Kirkpatrick's investigators that he had been briefed on a secret alien project decades earlier, and was warned that if he ever repeated the secret he could be jailed or executed. The claim would be repeated to investigators by other men who had never spoken of the matter, even with their spouses.

It turned out the witnesses had been victims of a bizarre hazing ritual.

For decades, certain new commanders of the Air Force's most classified programs, as part of their induction briefings, would be handed a piece of paper with a photo of what looked like a flying saucer. The craft was described as an antigravity maneuvering vehicle.

The officers were told that the program they were joining, dubbed Yankee Blue, was part of an effort to reverse-engineer the technology on the craft. They were told never to mention it again. Many never learned it was fake. Kirkpatrick found the practice had begun decades before, and appeared to continue still. The defense secretary's office sent a memo out across the service in the spring of 2023 ordering the practice to stop immediately, but the damage was done.

Investigators are still trying to determine why officers had misled subordinates, whether as some type of loyalty test, a more deliberate attempt to deceive or something else.

After that 2023 discovery, Kirkpatrick's deputy briefed President Joe Biden's director of national intelligence, Avril Haines, who was stunned.

Could this be the basis for the persistent belief that the U.S. has an alien program that we've concealed from the American people? Haines wanted to know, according to people familiar with the matter. How extensive was it? she asked.

The official responded: "Ma'am, we know it went on for decades. We are talking about hundreds and hundreds of people. These men signed NDAs. They thought it was real."

The finding could have been devastating to the Air Force. The service was particularly sensitive to the allegations of hazing and asked that AARO hold off on including the finding in the public report, even after Kirkpatrick had briefed lawmakers on the episode. Kirkpatrick retired before that report was finished and released.