air national guard units are trained and equipped by the united states air force. the state (or equivalent) ang units, depending on their mission, are operationally gained by a major command of the usaf if federalized. in addition, personnel and equipment are routinely federalized and deployed by the usaf as part of air and space expeditionary forces, and are currently engaged in combat operations under united states air forces central (usafcent) as part of the global war on terrorism.