Smoke fills the sky from a prescribed burn at Beale Air Force Base, Calif., June 19, 2012. Team Beale firefighters burned the M60 machine gun range to prevent the field from catching on fire from hot casing during firing training. (U.S. Air Force photo by Senior Airman Allen Pollard/Released)

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Photo by: Senior Airman Allen PollardReleased |  VIRIN: 120619-F-EC341-012.JPG