But what if the most clandestine intelligence program in U.S. history was shut down not because it failed, but because it had uncovered something too extraordinary to reveal? But from 1977 to 1995, the CIA secretly funded one of the strangest efforts in modern espionage: Project Stargate. Trained under the then-classified program, “psychic spies” used remote viewing to mentally perceive targets without travel. Millions went into the effort, with military and intelligence officials hoping it could yield intelligence that no satellite or informant could. Tested under controlled conditions, participants were tasked with describing enemy facilities, tracking fugitives, or even locating...