The Twelfth Air Force (12 AF; Air Forces Southern, (AFSOUTH)) is a Numbered Air Force of the United States Air Force Air Combat Command (ACC). It is headquartered at Davis–Monthan Air Force Base, Arizona.
The command is the air component to United States Southern Command (USSOUTHCOM) conducting security cooperation and providing air, space, and cyberspace capabilities throughout Latin America and the Caribbean.
The Boeing YAL-1 airborne laser testbed was a modified Boeing 747-400F with a megawatt-class chemical oxygen iodine laser (COIL) mounted inside. It was primarily designed to test its feasibility as a missile defense system to destroy tactical ballistic missiles (TBMs) while in boost phase. The aircraft was designated YAL-1A in 2004 by the U.S. Department of Defense.
The YAL-1 with a low-power laser was test-fired in flight at an airborne target in 2007. A high-energy laser was used to intercept a test target in January 2010, and the following month, successfully destroyed two test missiles. Funding for the program was cut in 2010 and the program was canceled in December 2011. It made its final flight on February 14, 2012, to Davis–Monthan Air Force Base near Tucson, Arizona, to be kept in storage at the "boneyard" operated by the 309th Aerospace Maintenance and Regeneration Group. It was ultimately scrapped in September 2014 after all usable parts were removed.