On November 20, the U.S. Air Force retired its final Conventional Air-Launched Cruise Missile (CALCM), a long-range cruise missile carried by the B-52 bomber. Developed in the 1970s, the CALCM first saw combat use during the Gulf War of 1991, and was employed in major combat operations including Allied Force, Enduring Freedom, and Iraqi Freedom. Armed with a variety of explosive warheads, the GPS-guided CALCM has a range of over 1,200 km.