Two U.S. Air Force A-10 Thunderbolt II assigned to the 354th Fighter Squadron, Davis-Monthan Air Force Base, Ariz., fly in formation after attacking training ground targets during Red Flag-Alaska 14-1, May 15, 2014, Joint Pacific Alaska Range Complex, Alaska. The A-10 is built around the GAU-8 Avenger, firing 30mm armor piercing incendiary and high explosive incendiary rounds at 4,200 rounds per minute with an effective range of 4,000 feet. (U.S. Air Force photo by Senior Airman Joshua Turner/Released)