LSD has had quite a history with the CIA. It all started with the 1950 trial of double agent Jozef Cardinal Mindszenty for treason to Russia. During the trial, Josef was observed to be incredibly "high" and figured that he had been drugged into testifying by the Russians.
Under the fear of a "large scale drug attack," the CIA launched an extensive, decade long program focused on LSD. Their main goal, according to interdepartmental memo revealed to Congress was to see if they could "get control of an individual to the point where he will do [their] bidding against his will and even against fundamental laws of nature, such as self preservation," aka; mind control.
But they also managed to sneak in some time for fun and games. They would also secretly dose one another with LSD. It was so common at one point that the CIA even hired stage magicians to train agents in sleight of hand techniques. It's always nice to know that the people responsible for national security have their priorities straight.