A U.S. Air Force A/OA-10 Thunderbolt II from the 355th Fighter Squadron is surrounded by a cloud of gun smoke as it fires a 30mm GAU-8 Avenger Gatling gun over the Pacific Alaska Range Complex in Alaska on May 29, 2007. The seven-barrel Gatling gun can be fired at a rate of 3,900 rounds per minute. DoD photo by Airman 1st Class Jonathan Snyder, U.S. Air Force. (Released)