Analysis of information sources in references of the Wikipedia article "MKUltra" in English language version.
Some MKUltra activities raise questions of legality implicit in the original charter.
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.