Logistics Complex includes the 76 Aircraft Maintenance Group, the 76 Propulsion Maintenance Group, the 76 Commodities Maintenance Group, the 76 Software Engineering Group and the 76 Maintenance Support Group. Combined, these groups provide depot-level maintenance, repair and overhaul of KC-135, B-52, E-3, E-6, and B-1 aircraft, as well as engines, components, support equipment, and associated software for the US Air Force and US Navy. The 72nd Air Base Wing is a multi-unit, multi-mission wing that includes base services and support for the Oklahoma City Air Logistics Center, associate organizations, dependents, and retirees. The 38th Cyberspace Engineering Group, Air Force Space Command, has worldwide responsibility for engineering, installation, and interoperability of all communications and electronic facilities for the Air Force. Oklahoma Wing Civil Air Patrol Headquarters is located at the base ops building and provides state-level support to the 17 units across the state. The Flying Castle Composite Squadron is a Civil Air Patrol squadron that is composed of cadet and senior members that meet Tuesday evenings. The 552nd Air Control Wing flies Air Combat Command's E-3 Sentry AWACS aircraft. The E-3's radar and other sensors provide deep-look surveillance, warning, interception control and airborne battle management. The 552 ACW encompasses 3 groups: 552nd Operations Group, 552nd Maintenance Group and 552nd Air Control Group. The 507th Air Refueling Wing of the Air Force Reserve Command (AFRC) is one of two Air Force Reserve flying units in the state of Oklahoma and administratively reports to Fourth Air Force (4 AF). The wing operates twelve KC-135R "Stratotanker" air refueling aircraft at Tinker and is operationally gained by Air Mobility Command (AMC). As an associate unit, the 507 ARW also operates the Federal Aviation Administration's (FAA) British Aerospace 125-800 aircraft (ex-USAF C-29A) in the aviation standards and navigational aid inspection mission. Navy and other defense agencies The United States Navy's Strategic Communications Wing One consists of three squadrons and a wing staff, and employs over 1,300 active-duty sailors and 100 contractors to provide maintenance, security, operations, administration, training and logistic support for the E-6 Mercury aircraft fleet. The E-6B Mercury enables the president of the United States and the Secretary of Defense to directly contact submarines, bombers and missile silos enforcing the country's national security through nuclear deterrence. The wing also operates alert facilities for E-6B aircraft at Travis AFB, California and Naval Air Station Patuxent River, Maryland. Defense Mega Center Oklahoma City is the