I know Wikipedia may not be the most reliable source of information, as people are free to edit and change information on a whim. But, declassified information by the government is still declassified information - Wikipedia just happens to be the channel for this knowledge.
"Project MKUltra was the code name of a U.S. government covert research operation experimenting in the behavioral engineering of humans (mind control) through the CIA's Scientific Intelligence Division. The program began in the early 1950s, was officially sanctioned in 1953, was reduced in scope in 1964, further curtailed in 1967 and "officially halted" in 1973.
Once you understand what the word government really means, you can begin to remove the veil.