Spin: a most interesting article from 1994, Altered States of America—The CIA's Covert LSD Experiments

“The LSD,” Feldman began, “that was just the tip of the iceberg. Write this down. Espionage. Assassinations. Dirty tricks. Drug experiments. Sexual encounters and the study of prostitutes for clandestine use. That's what I was doing when I worked for George White and the CIA.”