ELLSWORTH AIR FORCE BASE, S.D. -- (Left) Tech. Sgt. Taft Tubbs and Senior Airman Tavares Battle, 28th Aircraft Maintenance Squadron load crew members, perform a weapons load during the Global Strike Challenge, June 9. The Global Strike Challenge consists of a uniform inspection, general knowledge test, tool inspection, munitions build, weapons load and B-1B Lancer preflight inspection. (U.S. Air Force photo/Airman 1st Class Corey Hook)