During the beginning of the cold war, Killeen Base was one of the Air Force's storage-and-assembly bases for nuclear weapons. Gray Air Force Base near the AEC's Killeen Base (Site Baker), one of three National Stockpile Sites where nuclear weapons were stored at the time. (look North west for nuclear waste storage site) The airfield, which is approximately the size of an average Air Force installation, actually belonged to the Air Force from 1947 to 1952. From 1952 to 1969, the airfield and facilities were run by the Army under the Defense Atomic Support Agency. It became an actual part of Ft Hood in 1969. Great topo map of nuke storage site at the globalsecurity.org link.
Military - Weapon Depots