The CIA were just _obsessed_ with LSD for all sorts of HUMINT purposes. Part of this was that they were operating under the faulty assumption that the USSR and

The CIA were just _obsessed_ with LSD for all sorts of HUMINT purposes. Part of this was that they were operating under the faulty assumption that the USSR and other Cold War powers were ordering massive amounts of the stuff, so the whole "Russians are gonna do it faster, stronger, and better than us UNLESS we prepare" complex kicked in. There was, of course, a strong incentive to test anti-interrogation techniques, should enemy intelligence use LSD against captured spies/our guys. From my own teenage experimentation, I can posit that, in the right set and setting, it'd be damn hard for me to keep any sort of secret. But it would probably be the combined fear from being tortured/interrogated while definitely having a bad trip that would give me up.