Enough LSD to intoxicate several hundred million people… had come and gone.
Systematic testing July 1960.
It took almost three years, and an estimated 100,000 hours of professional effort by physicians, nurses, technicians and volunteers…
Excerpts From ‘Chemical Warfare: Secrets Almost Forgotten’
Hallucinogenic Weapons: The Other Chemical Warfare
At the Army Chemical Center at Edgewood Arsenal in Maryland, psychiatrist James S. Ketchum was testing LSD, BZ and other psychedelic and deliriant compounds on fully informed volunteers for the U.S. military.