We know about MK-Ultra, the CIA’s spectacularly illegal and immoral experimental mind control project, because while the CIA director ordered all the records destroyed, he missed the ones classified as budgetary records rather than project records. Cataloging matters! https://specialcollections.princeton.edu/2025/10/the-cias-quest-for-mind-control-piecing-together-project-mk-ultra-and-its-princeton-connections-part-i-allen-w-dulles-class-of-1914/