Kinzer (2019) says: "CIA officers in Europe and Asia were capturing enemy agents and others who they felt might be suspected persons or were otherwise what they called 'expendable.' They would grab these people and throw them into cells and then test all kinds of, not just drug potions, but other techniques, like electroshock, extremes of temperature, sensory isolation—all the meantime bombarding them with questions, trying to see if they could break down resistance and find a way to destroy the human ego."