GRISSOM AIR RESERVE BASE, Ind., -- Senior Airman Karl Ackerman (left), a KC-135R crew chief, pulls a fuel sample while Senior Airman Michael Sawyer, also a KC-135R crew chief, and Senior Master Sgt. Nancy Hinojosa observe. Sergeant Hinojosa and other 4th Air Force team members from Travis AFB, Calif., were at Grissom as part of a functional area visit. (U.S. Air Force photo/Staff Sgt. Chris Bolen)
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