OPERATION ENDURING FREEDOM -- Staff Sgt. Shane McDaniel services an environmental control unit at a forward-deployed location in Southwest Asia. The air conditioning provided by units keeps tents at comfortable temperatures. McDaniel is a heating, ventilation and air-conditioning journeyman with the 380th Expeditionary Civil Engineer Squadron. He is deployed from the 9th Civil Engineer Squadron at Beale Air Force Base, Calif. (U.S. Air Force Photo by Maj. Robert Couse-Baker)