Even more than most people understand because they don't understand the initial secret happening happened when Manhattan Project scientists were involved in construction of whatever went on under Truman and Eisenhower.
Gray was also named as one of the advisors on the top secret research and development organization established by Truman as it appears in the leaked Majestic 12 documentation.
It may have evolved in this period from a small Truman-era committee to a more structured program under Eisenhower, and elite think tanks like these may have served as its intellectual and strategic backbone.
NATO, or rather the Allies, allies are telling Churchill and, uh, I guess, the Gaul and, uh, Truman, that this army can move across Western Europe in six weeks.