Airmen prepare for Antarctic climb
Capt. Graydon Muller pulls a kayak across a field Oct. 28, 2010, at Hurlburt Field, Fla., to simulate pulling a supply sled in preparation for an upcoming mountaineering expedition to climb Vinson Massif, the highest mountain in Antarctica. Captain Muller and Capt. Rob Marshall, a member of the 8th Special Operations Squadron, depart Nov. 24, 2010, to climb the 16,076 foot mountain as part of the U.S. Air Force Seven Summits Challenge, an effort for Air Force members to climb the highest mountain on each continent. Captain Muller is a member of the 6th Special Operations Squadron at Hurlburt Field. (U.S. Air Force photo/Staff. Sgt. Stephanie Jacobs)