Airman 1st Class Caleb Burker, 28th Aircraft Maintenance Squadron weapons load crew member, secures an MK-82 training munition onto a trailer during an Operational Readiness Exercise at Ellsworth Air Force Base, S.D., March 20, 2013. Munitions must be properly secured to prevent mishaps and injuries. (U.S. Air Force photo by Airman 1st Class Anania Tekurio/Released)