Naval Support Facility Thurmont, popularly known as Camp David, is a mountain based military camp in Frederick County, Maryland used as a country retreat and for high alert protection of the President of the United States and his guests....
The Camp is alleged to be one of the most secure facilities in the world, as reported by a Department of Defense journal in 1998. The facility is guarded by one of the United States Marine Corps' most elite units, MSC-CD (Marine Security Company, Camp David). Each Marine is hand-picked from the infantry field and sent through a battery of psychological and physical tests. Selected Marines must then undergo specialized security training at the Marine Corps Security Forces School in Chesapeake, Virginia.
The candidates then report to the Marine Barracks, Washington, D.C., where they provide protection for the barracks, the Commandant of the Marine Corp and the CNO of the Navy and top Naval officers residing at the Washington Naval Yard. Assuming a Marine successfully completes all required schooling, they still must undergo the "Yankee White" background check. Only then is the candidate eligible for assignment to Camp David.
After twelve months of service at Camp David, a Marine is awarded the Presidential Service Badge. Tours of duty at Camp David typically last for 18 to 20 months.