HYDRAULIC HANDS U.S. Air Force Staff Sgt. Shane Olguin, right, and Airman 1st Class Chris Gonzalez, check the fluid flow of an AV843 hydraulic test stand during an inspection on March Air Reserve Base, Calif., June 30, 2009. The stand is used for checking hydraulic and pneumatic components. Both airmen are assigned to the 452nd Maintenance Squadron. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 824314-P-QQQ67-355.jpg Photo Gallery