53rd Wing  The 53d Wing (53 WG) is a wing of the United States Air Force based at Eglin Air Force Base, Florida. The wing reports to the United States Air Force Warfare Center at Nellis Air Force Base, Nevada, which in turn reports to Headquarters Air Combat Command. The 53d Wing serves as the focal point for the combat air forces in electronic warfare, armament and avionics, chemical defense, reconnaissance, and aircrew training devices. The wing is also responsible for Operational Testing and Evaluation (OT&E) of new equipment and systems proposed for use by these air forces. Current wing initiatives include advanced self-protection systems for combat aircraft, aircrew life support systems, aerial reconnaissance improvements, new armament and weapons delivery systems, and improved maintenance equipment and logistics support. The 53d Wing, which consists of four groups, numbers almost 2,000 military and civilians at 17 locations throughout the United States. The group was activated in 1941 as the 53d Pursuit Group with the 13th, 14th, and 15th Pursuit Squadrons assigned. The 53d trained fighter pilots with Seversky P-35 and Curtiss P-40 Warhawk aircraft from its activation until December 1941. After the United States entered World War II the group moved to the Panama Canal Zone to fly patrols in defense of the Panama Canal. In conjunction with the move, the group converted to Bell P-39 Airacobra aircraft. There it was redesignated as the 53d Fighter Group. The group returned to Florida in November 1942, where it became a Replacement Training Unit (RTU) training replacement fighter pilots. RTUs were oversized units whose mission was to train individual pilots or aircrews. It used P-39s until June 1943 and Republic P-47 Thunderbolts thereafter. In early 1943, the group added a fourth squadron, the 438th Fighter Squadron. The AAF found that standard military units, based on relatively inflexible tables of organization were proving less well adapted to the training mission. Accordingly, a more functional system was adopted in which each base was organized into a separate numbered unit. The group was disbanded in as a result of this reorganization in 1944 and its personnel, equipment and mission were assumed by the 338th AAF Base Unit (Replacement Training Unit, Fighter). The group was reconstituted, redesignated as the 53d Fighter Group (Air Defense) and activated to replace the 521st Air Defense Group at Sioux City Municipal Airport as part of Air Defense Command's Project Arrow to bring back on the active list fighter units that had achieved memorable records in the two World Wars.