 After this date, the base was completely deserted, with the only structures left standing being the Joint Operations Center (JOC) building at the east end of the runway, chemical bunkers in the weapon storage area and at least one Quonset hut.Built in 1964, the JOC is a four-floor concrete and steel administration building for the island that has no windows and was built to withstand a category IV tropical cyclone as well as atmospheric nuclear tests.The building remains standing but was gutted entirely in 2004, during an asbestos abatement project.