It may be difficult for Americans to comprehend the frame of mind of the men who ... started the Central Intelligence Agency's effort to manipulate human behavior. The C.I.A. leaders were certain the Communists had embarked on a campaign to control men's minds and they were determined to find a defense, setting out in earnest the next year1950with Project Bluebird, which evolved into Project Artichoke, then became MK-ULTRA - MK-DELTA. With each code name change, they broadened their sweep, until there remained virtually no avenue of human behavior control they were not exploring. There was an urgent need," the C.I.A. and other intelligence agencies argued, to develop "effective and practical techniques" to "render an individual subservient to an imposed will or control." The C.I.A. men ... acknowledged among themselves that much of what they were setting out to do was "unethical," bordered on the illegal and would be repugnant to the American people. "Precautions must be taken," one agency official wrote in an internal memo, "not only to protect the operation from exposure to enemy forces, but also to conceal these activities from the American public in general." They wanted to be able to get away with murder without leaving a trace. In attempts to develop ways to administer lethal and mind-altering drugs surreptitiously through clothing as thick as a leather jacket, they tried out small spray guns and pencil-like injectors. They studied the writing of the psychologist who worked with Adolf Hitler, wondered about the use of the "occult" and of "black psychiatry."