From Wikipedia: Project MKUltra, or MK-Ultra, was a covert, illegal human research program into behavioral modification run by the Central Intelligence Agency's (CIA) Office of Scientific Intelligence. The program began in the early 1950s, was officially sanctioned in 1953, was reduced in scope in 1964, further curtailed in 1967 and finally halted in 1973. It controversially used unwitting U.S. and Canadian citizens as its test subjects. MKUltra involved the use of many methodologies to manipulate people's individual mental states and alter brain functions, including the surreptitious administration of drugs (especially LSD) and other chemicals, hypnosis, sensory deprivation, isolation, verbal and sexual abuse, as well as various forms of torture. A Freedom Of Information Act request uncovered a cache of 20,000 documents relating to project MKUltra, which led to Senate hearings later that same year which began on August 3rd, 1977.