 The Data Center (DC-12), with its AN/FSQ-7 computer remained active until 4 August 1983 under the 25th AD when technology advances made the SAGE system obsolete.Today, the successor organization to the 25th AD, the Western Air Defense Sector (WADS), is a major tenant organization at McChord, being one of two air defense sectors responsible for the security and integrity of continental United States air space.WADS is staffed by members of the Washington Air National Guard (WANG) and the Royal Canadian Air Force (RCAF).