From 2008 to 2015, the Oklahoma Air National Guard's 137th Air Refueling Wing also assumed an aerial refueling mission in accordance with the 2005 BRAC Recommendations. The then-137th Airlift Wing (ANG) relocated from Will Rogers Air National Guard Base to Tinker AFB, was redesignated as an air refueling wing, and associated with the 507 ARW while its C-130H aircraft were redistributed to other ANG airlift wings. In 2015, the 137th ended its associate relationship with the 507th, was redesignated as the 137th Special Operations Wing (137 SOW), and returned to Will Rogers ANGB where it operates the MC-12 Liberty aircraft, operationally gained by Air Force Special Operations Command (AFSOC).