What are the most evil CIA operations you know about?

That was really a classic and perhaps you can add [Timber Sycamore](https://en.wikipedia.org/wiki/Timber_Sycamore) where a more recent presidential order was to have the CIA to train organize and equip Al Qaeda/ISIS to overthrow the Syrian government and then follow up with President Trump doing a meet and greet with an CIA described head chopper.

MK Ultra. Based on things that are public they tortured mildly mentally ill people until they regressed to mental infancy and even killed people. This was actually mostly done in Canada despite the CIA funding. Makes sense they wouldn’t want to do it all in the center of the empire. The average Canadian still wouldn’t believe you if you said your grandma was left permanently disabled from CIA mind control experiments in Montreal.