“The occasion was highly informal,” he remembered, in one of the only known written recollections of the meeting. “Maps were spread out on the floor, drinks were served, a dog kept crossing the demilitarized zone as top secret matters were discussed. Even though the subject was the Jason study, I was the only Jason present.” Seymour Deitchman did most of the talking. “It was, you know, a typical social occasion,” MacDonald recalled, except the participants were “just… deciding the next years of the Vietnam War.”