Service members conquer extreme Alaska at 'Cool School'
U.S. Air Force Lt. Col. Marie Westphal, Joint Base Elmendorf-Richardson, Alaska, 517th Airlift Squadron flight surgeon, and Force Staff Sgt. Vance Streeter, JBER 210th Rescue Squadron aerial gunner, utilize a signal fire to enhance the visibility of Mk-13 smoke signals Feb. 22, 2013, Eielson Air Force Base, Alaska. The heat from the fire pushes the smoke signal higher into the air, increasing the chances of being noticed by rescue operations. (U.S. Air Force Photo/Airman 1st Class Peter Reft)
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