8/28/2012 - Capt. Nathan Mott, aircraft commander, conducts mission planning with Capt. Charles Shank, navigator, Capt. Dennis Zabka, pilot, Capt. Paul St. George, electronic warfare officer and Capt. Bryson Ayers, radar navigator, at Barksdale Air Force Base, La., Aug. 27, 2012. All five Airmen are assigned to the 11th Bomb Squadron at Barksdale, and were preparing to fly a sortie for the Global Strike Challenge. (U.S. Air Force photo by Master Sgt. Jeff Walston/Released)

8/28/2012 - Capt. Dennis Zabka, a pilot assigned to the 11th Bomb Squadron checks his mask for leaks at Barksdale Air Force Base, La., Aug. 27, 2012. Zabka is part of the 11 BS team competing in the Global Strike Challenge. (U.S. Air Force photo by Master Sgt. Jeff Walston/Released)