Operation Enduring Freedom
U.S. Air Force Staff Sgt. John Green (left), Master Sgt. Jeff Dillon (center), and Staff Sgt. Justin Greenhow (right), 455th Expeditionary Aircraft Maintenance Squadron crew chiefs, secure a new tire to the nose landing gear of a C-130 Hercules aircraft during a tire change procedure at Bagram Airfield, Afghanistan, April 9, 2011. Green, Dillon, and Greenhow are deployed from the Delaware Air National Guard’s 166th Aircraft Maintenance Squadron, New Castle, Del., supporting Operation Enduring Freedom. (U.S. Air Force photo/Master Sgt. William Greer)