Students work through an urban warfare scenario during the basic security operations course at Andersen South, Guam, May 17, 2013. Thirty-one defenders from Kadena Air Base, Japan, and Eielson Air Force Base, Alaska participated in the 17-day course to enhance their mission skills for deployment, as well as use the skills to train other defenders at their home stations. (U.S. Air Force photo by Staff Sgt. Benjamin Wiseman/Released)