U.S. Air Force Senior Airman Garrett Merryman, 18th Civil Engineer Squadron heating, ventilation, air conditioning and refrigeration journeyman, warns a simulated suspicious person during Defensive Fighting Position training on Torii Beach, Japan, March 20, 2014. The training, which the 18th CES conducts every two years, teaches airmen how to protect themselves, improve their combat capability and prepare them for future contingencies. (U.S. Air Force photo by Naoto Anazawa)