Project MK-Ultra (1953-1973) saw the CIA conduct mind control experiments using LSD, electroshock, sensory deprivation, and hypnosis on unwitting subjects including prisoners, mental patients, and drug addicts — 'people who could not fight back.' CIA director Sidney Gottlieb purchased the world's entire LSD supply for $240,000. Director Richard Helms ordered most records destroyed in 1973. The program was only confirmed in 1977 when 20,000 surviving documents were discovered. Over 1,200 records are now declassified.