What was Camp X?

Thus, an organization called British Security Coordination (BSC) set up shop in Rockefeller Center in New York City in 1940, in an office labeled innocuously as "British Passport Control." However, it functioned as a liaison between the Special Operations Executive (SOE) — a major British intelligence and espionage organization — and the U.S. officials leading the creation of American intelligence organizations. William Stephenson, a Canadian who had served Britain as a fighter pilot in World War I, headed BSC.