U.S. Army Spc. Manuel Calderon with 1st Battalion, 506th Infantry Regiment, 4th Brigade Combat Team, 101st Airborne Division provides over-watch security atop a mountain during Operation Gwashta Pass, at Paktika province, Afghanistan, May 25, 2011. The mission provided additional security for a convoy that was traveling in the area. (U.S. Army photo by Spc. George N. Hunt/Released)