Only sky proves limit for 'mountain men'
MOUNT ELBRUS, Russia -- First Lt. Mark Uberuaga prepares dinner at his base camp at 12,000 feet on Mount Elbrus. He and Capt. Rob Marshall reached the summit in four days. Lieutenant Uberuaga is assigned to the 21st Special Operations Squadron at Royal Air Force Mildenhall, England. (U.S. Air Force photo by Capt. Rob Marshall)