Boeing YAL-1
 The Boeing YAL-1 Airborne Laser Testbed (formerly Airborne Laser) weapons system is a megawatt-class chemical oxygen iodine laser (COIL) mounted inside a modified Boeing 747-400F. It is primarily designed 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.