Only sky proves limit for 'mountain men'
MOUNT ELBRUS, Russia -- First Lt. Mark Uberuaga (left) and Capt. Rob Marshall proudly display the American flag after reaching the summit of Mount Elbrus. Lieutenant Uberuaga is assigned to the 21st Special Operations Squadron, and Captain Marshall is assigned to the 67th Special Operations Squadron. Both are from Royal Air Force Mildenhall, England. (U.S. Air Force photo)