From the late 1970s to the 1980s, the US Government paid for intelligence officers to undergo weeklong training sessions at a remote place called the Monroe Institute. Training sessions themselves aren't particularly abnormal -- but these officers weren't learning new languages, the latest news about satellites and so on. Instead, the Institute was using hypnosis to teach them astral projection, ESP and clairvoyance. The news went public via a declassified CIA document released in 1984, but questions remain: Was this all a waste of money? Or was there something else to the story?
See omnystudio.com/listener for privacy information.