Country Music stars tour the 99th Ground Combat Training Squadron

NEVADA TEST AND TRAINING RANGE -- Singer, Troy Gentry of the group "Montgomery Gentry" fires a Mk19, 40mm Automatic Grenade Launcher as Staff Sgt. Christopher McAlleer, 99th Ground Combat Training Squadron looks on. Mr. Gentry and other country music stars toured the ground combat training facility before the Academy of Country Music's USO concert at Nellis Air Force Base April 17, 2010. (U.S. Air Force photo by Lawrence Crespo)

Country Music stars tour the 99th Ground Combat Training Squadron

NEVADA TEST AND TRAINING RANGE -- Singer, Randy Houser, fires a M240B, machine gun as Senior Airman Alvernita Payne, 99th Ground Combat Training Squadron provides instruction to country music stars who toured the ground combat training facility before the Academy of Country Music's USO concert at Nellis Air Force Base, April 17, 2010. (U.S. Air Force photo by Lawrence Crespo)

Country Music stars tour the 99th Ground Combat Training Squadron

NEVADA TEST AND TRAINING RANGE -- Staff Sgt. Joshua Svendsen, a combat arms instructor assigned to the 99th Ground Combat Training Squadron assists country music singer LeAnn Rimes to fire 50 caliber machine gun from atop a HUMVEE at the 99th GCTS firing range April 17, 2010. The Academy of Country Music and the USO toured the 99th GCTS before performing a free concert at Nellis Air Force Base. (U.S. Air Force photo by Tech. Sgt. Michael R. Holzworth)

Academy of Country Music and the USO host a free concert at Nellis AFB

NELLIS AIR FORCE BASE, Nev. -- Singers, Randy Houser and LeAnn Rimes perform onstage during the Academy of Country Music's USO concert at Nellis Air Force Base April 17, 2010. (U.S. Air Force photo by Tech. Sgt. Michael R. Holzworth)

Country Music stars tour the 99th Ground Combat Training Squadron

NEVADA TEST AND TRAINING RANGE -- Staff Sgt. Korey Hampton a combat arms instructor assigned to the 99th Ground Combat Training Squadron shows country music singer LeAnn Rimes how to fire a M240B machine gun at the 99th GCTS firing range April 17, 2010. The Academy of Country Music and the USO toured the 99th GCTS before performing a free concert at Nellis Air Force Base. (U.S. Air Force photo by Tech. Sgt. Michael R. Holzworth)

Academy of Country Music and the USO host a free concert at Nellis AFB

NELLIS AIR FORCE BASE, Nev. -- Singer, Randy Houser performs onstage during the Academy of Country Music's USO concert at Nellis Air Force Base April 17, 2010. (U.S. Air Force photo by Tech. Sgt. Michael R. Holzworth)