ELLSWORTH AIR FORCE BASE S.D. - (Left) Tech. Sergeant 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 pre-flight inspection. (U.S. Air Force photo/Airman 1st Class Corey Hook)