Orange One is a U.S. Navy–operated facility located in the Appalachian Mountains, extending underneath Camp David, the U.S. President's country retreat.
According to the diary of British Prime Minister Harold Macmillan, who toured the facility in 1959, Orange One can house a staff of 200 persons in two separate wings and is a "fortress ... hewn out of the rock".
[2] Gulley noted that, as of the mid 1970s, Orange One was no longer considered a primary command and control facility as its communications systems had not, at that time, been improved and it had not been updated to withstand attack by certain categories of weapons.
[3] In April 1961, then-former president Eisenhower returned to Camp David for consultations with John F. Kennedy on the failed Bay of Pigs invasion.
[4] According to former Associated Press reporter Dale Nelson, Kennedy inspected Orange One following Eisenhower's departure before helicoptering to his private estate, Glen Ora, in Middleburg, Virginia.