but equally important category of TR is the Individual Mobilization Augmentee (IMA). IMAs are part-time Air Force Reservists who are assigned to active duty Air Force units and organizations, combat support agencies, Unified Combatant Commands and the Joint Staff to do jobs that are essential in wartime or during contingency operations, but do not require full-time manning during times of peace. They report for duty a minimum of two days a month and twelve additional days a year, but like their Unit Program counterparts, many IMAs serve well in excess of the minimum military duty requirement, providing multiple weeks or months of active duty "man-days" in support of active duty USAF and joint commands. A smaller number of Reservists serve limited tours of extended active duty in an Active Duty Special Work (ADSW) status, usually at an Air Force headquarters staff level, in the joint combatant commands, or in other special assignments. Their job is to bring Air Force Reserve expertise to the planning and decision-making processes at senior levels within the Air Force, other services, and the Unified Combatant Commands. Like the Air National Guard, the Air Force Reserve Command also requires two categories of full-time personnel to perform functions that require full-time manning. These full-time positions are filled via the same two programs as employed by the Air National Guard: the Active Guard and Reserve (AGR) program and the Air Reserve Technician (ART) program. Air Force Reservists who become members of the Active Guard and Reserve (AGR) receive full active duty pay and benefits just like active duty members of any branch of the armed forces. The majority of AGRs are former TRs and they serve four-year controlled tours of special duty that can be renewed. Many AGRs serve with operational AFRC flying and non-flying wings and groups; at active and reserve numbered air forces; on the staffs of other USAF Major Commands (MAJCOMs), Field Operating Agencies (FOAs) and Direct Reporting Units (DRUs); on the Air Staff at Headquarters, U.S. Air Force (HAF); on the staffs of Unified Combatant Commands; on the Joint Staff and in the Office of the Secretary of Defense (OSD). AFRC Recruiting is another field that employs AGR personnel. AGRs also have the option with good performance to serve 20 or more years on active duty and receive a retirement after 20 or more years, just like active members of the Regular Air Force.