by the Air Mobility Command (AMC). The Air Force Reserve also operates the WC-130 Hurricane Hunter in the weather reconnaissance mission and provides the sole USAF capability for this mission set. In tandem with Air Force Special Operations Command (AFSOC), AFRC previously operated the MC-130E Combat Talon I aircraft until its retirement in 2013. AFRC's sole special operations wing currently operates the C-146A Wolfhound, C-145A Skytruck, and U-28A, providing Formal Training Unit (FTU) functions for both the active duty Air Force and the Air Force Reserve on those aircraft. The 919 SOW also operates the MQ-9 Reaper remotely piloted aircraft (RPA) in the attack and intelligence, surveillance and reconnaissance (ISR) roles. Units Nearly 70,000 reservists are assigned to specific Air Force Reserve units. These are the people who are obligated to report for duty for a minimum one weekend each month and two weeks of annual training a year, with most performing many additional days of military duty. Reserve aircrews, for example, average more than 120 military duty days a year, often flying in support of national objectives at home and around the world. Air Reserve Technicians (ARTs), the special group of reservists who work as Air Force civil service employees during the week in the same jobs they hold as reservists on drill weekends and active duty periods, provide a degree of continuity that serves to make the Air Force Reserve a relevant combat force. ARTs are the full-time backbone of the unit training program, providing day-to-day leadership, administrative and logistical support, and operational continuity for their units. More than 9,500 reservists, over 15 percent of the force, serve full-time as ARTs. Air Force Reserve Command consists of three Numbered Air Forces: Fourth Air Force (4 AF) March Air Reserve Base, California 315th Airlift Wing (C-17A) Associate unit with 437th Airlift Wing Joint Base Charleston, South Carolina 349th Air Mobility Wing (C-5M, C-17A, KC-10A) Associate unit with 60th Air Mobility Wing Travis Air Force Base, California 433d Airlift Wing (C-5M) Lackland AFB / Kelly Field Annex, Joint Base San Antonio, Texas Includes C-5 Formal Training Unit (FTU) mission under AETC 434th Air Refueling Wing (KC-135R) Grissom Air Reserve Base, Indiana 445th Airlift Wing (C-17A) Wright-Patterson Air Force Base, Ohio 446th Airlift Wing (C-17A) Associate unit with 62d Airlift Wing McChord Field, Joint Base Lewis-McChord, Washington 452d Air Mobility Wing (C-17A, KC-135R) March Air Reserve Base, California 1 of 2