Empirical rule ie standard dev.
Is the Explosion-Noisy Base a C.I.A. Spy School? What Base?
By TIM WEINER
Published: Friday, March 20, 1998
Harvey Point is the place where, for the last 37 years, the Central Intelligence Agency has run secret paramilitary and counter-terrorism courses for thousands of its officers and select foreigners – most recently, the Palestinian security forces, according to intelligence officials. Established weeks after the 1961 Bay of Pigs invasion, this school for spies has been shielded by secrecy, security fences and cypress trees festooned with Spanish moss ever since.
Over the last decade, the C.I.A. has given counter-terrorism training to more than 18,000 foreign intelligence officers from 50 different countries, including Russia, Israel and Egypt, according to agency officials. Some of that training took place abroad, not at Harvey Point. The agency does not discuss its training installations – ever.
http://en.wikipedia.org/wiki/Harvey_Point
The Harvey Point Defense Testing Activity facility, owned by the Department of Defense, is located on a peninsula in Perquimans County, North Carolina, along the Albemarle Sound, near the city of Hertford, NC.
The principal tenant is the CIA. Other agencies such as the ATF and the FBI have used the facility for complex training relating to overseas counter terrorism and asset protection training.
https://cryptome.org/eyeball/harvey/harvey-eyeball.htm