CHECKING SIGHT VALUES U.S. Air Force Tech. Sgt. James Erickson, an avionics integrated technician assigned to the 452nd Maintenance Squadron, checks the bore sight values of a C-17 Globemaster III aircraft head-up display on March Air Reserve Base, Calif., Feb. 18, 2008. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 374581-S-HYG44-308.jpg Photo Gallery