Analysis of information sources in references of the Wikipedia article "Projekt MKUltra" in Danish language version.
Though Project MK-Ultra lasted from 1953 until about 1973, details of the illicit program didn’t become public until 1975, during a congressional investigation into widespread illegal CIA activities within the U.S. and around the world.
Several prominent medical research institutions and Government hospitals in the United States and Canada were involved in a secret, 25-year, $25-million effort by the Central Intelligence Agency to learn how to control the human mind. ... Dr. Harris Isbell, who conducted the research between 1952 and 1963, kept up a secret correspondence with the C.I.A.
