171102-M-QH615-217 OKINAWA, Japan (Nov. 2, 2017) A U.S. Marine with Combat Assault Battalion, based out of Camp Schwab, Japan, opens the back door to an Amphibious Assault Vehicle during exercise Blue Chromite. the exercise is a U.S. only exercise which strengthens the Navy-Marine Corps expeditionary, amphibious rapid-response capabilities based in Okinawa and the greater Indo-Asia-Pacific region. (U.S. Marine Corps photo by Sgt. Aaron S. Patterson/Released)