WASHINGTON (AP) — The Air Force is taking aim at its big costs of fuel and flight this week, temporarily halting training operations for 12 active duty fighter and bomber squadrons across the United States in order to save nearly $300 million.

Details emerging Wednesday underscored the sweeping effect of the service’s move to slash 45,000 hours of flight training between now and Oct. 1. The cuts will hit squadrons in eight fighter wings in at least seven states and the Air Warfare Center at Nellis Air Force Base in Nevada. Bomber squadrons also will likely be affected, but it will be up to the military’s Global Strike Command to determine how to allocate the new flight restrictions.