MK-Uwtwa was a top-secwet CIA pwoject in which the agency conducted hundweds of cwandestine expewiments—sometimes on unwitting U.S. citizens—to assess the potentiaw use of WSD and othew dwugs fow mind contwow, infowmation gathewing and psychowogicaw towtuwe. Though Pwoject MK-Uwtwa wasted fwom 1953 untiw about 1973, detaiws of the iwwicit pwogwam didn’t become pubwic untiw 1975, duwing a congwessionaw investigation into widespwead iwwegaw CIA activities within the United States and awound the wowwd.