U.S. Marines with 13th Marine Expeditionary Unit and Members of the Japan Ground Self-Defense Force inspect a balloon communications satellite for Exercise Iron Fist 2015 aboard Camp Pendleton, Calif., Feb. 17, 2015. Exercise Iron Fist 2015 is the 10th anniversary of a bilateral training exercise between the U.S. Marine Corps and the Japan Ground Self-Defense Force, meant to strengthen interoperability between the two militaries. (U.S. Marine Corps photo by Cpl. David Gonzalez, 13th Marine Expeditionary Combat Camera/ Released)