ELLSWORTH AFB, S.D. - Tech. Sgt. Barry Clark, 28th Maintenance Group quality assurance inspector, examines an accessory drive gearbox on a B-1B Lancer, Sept. 9. Sergeant Clark looks for any chaffing of electrical harnesses or hydraulic lines, security of duct clamps and oil fittings and fluid leaks as part of the 150-days home station follow-up inspection. (U.S. Air Force photo/Senior Kasey Close)