516th Air Defense Group The 516th Air Defense Group is a disbanded United States Air Force organization . Its last assignment was with the 35th Air Division at McGhee Tyson Airport , Tennessee . It was inactivated on 18 August 1955 . The group was originally activated as a support unit for the 460th Bombardment Group at the end of World War II in Italy and then redeployed to the Caribbean , where it supported units redeploying from the European Theater until it was inactivated in 1945 . The group was activated once again in 1953 , when ADC established it as the headquarters for a dispersed fighter - interceptor squadron and the medical , maintenance , and administrative squadrons supporting it . It was replaced in 1955 when ADC transferred its mission , equipment , and personnel to the 355th Fighter Group in a project that replaced air defense groups commanding fighter squadrons with fighter groups with distinguished records during World War II . History . World War II . The group was first activated shortly before the end of World War II as the 516th Air Service Group in Italy in early 1945 as part of a reorganization of Army Air Forces ( AAF ) support groups in which the AAF replaced Service Groups that included personnel from other branches of the Army and supported two combat groups with Air Service Groups including only Air Corps units . Designed to support a single combat group . Its 942nd Air Engineering Squadron provided maintenance that was beyond the capability of the combat group , its 766th Air Materiel Squadron handled all supply matters , and its Headquarters & Base Services Squadron provided other support . Supported the 460th Bombardment Group in Italy , then moved to Trinidad and supported flying units redeploying from Europe to the United States until inactivated in the Caribbean . It was disbanded in 1948 . Cold War . During the Cold War , the group was reconstituted , redesignated as the 516th Air Defense Group , and activated at McGhee - Tyson Airport in 1953 with responsibility for air defense of Oak Ridge National Laboratory , Alcoa Aluminum Facilities and TVA dam infrastructure in the Tennessee Valley . The group was assigned the 469th Fighter - Interceptor Squadron ( FIS ) , which was already stationed at McGhee - Tyson Airport , and flying World War II era Republic F - 47 Thunderbolt s as its operational component . The 469th FIS had been assigned directly to the 35th Air Division . The group replaced the 74th Air Base Squadron as USAF host organization at McGhee - Tyson Airport . It was assigned three squadron s to perform its support responsibilities . The 469th FIS replaced its " Thunderbolts " with North American F - 86 Sabre jet aircraft in July 1953 In March 1954 , the 469th FIS was joined by the 460th FIS , flying HVAR rocket armed and airborne intercept radar equipped " Sabres " . The group was inactivated and replaced by the 355th Fighter Group ( Air Defense ) in 1955 as part of ADC ' s Project Arrow , which was designed to bring back on the active list the fighter units which had compiled memorable records in the two world wars . Disbanded again in 1984 . Lineage . Components . Operational Squadrons Support Units References . Bibliography . Further Reading