SEYMOUR JOHNSON AIR FORCE BASE, N.C. - Airman 1st Class Chris Boatright of the 4th Component Maintenance Squadron's Precision Measurement Equipment Lab calibrates the Guidance Control Section here June 19. Airman Boatright uses precise measurements to ensure the missile guidance system can put bombs on target, on time. (U.S. Air Force photo by Airman 1st Class Makenzie Lang)