On 1 December 2009, the new US Air Force Global Strike Command formally assumed nuclear deterrence missions with land-based Intercontinental Ballistic Missiles. The Command assumed command and responsibility for 20th Air Force and its three missile wings located at F.E. Warren Air Force Base in Wyoming; at Maelstrom Air Force Base in Montana; at Minot Air Force Base in North Dakota; as well as the 576th Flight Test Squadron at Vandenberg Air Force Base in California. The Command will later take over the B-52 and B-2 bombers as well.