160920-N-TR141-440 TINIAN, Northern Mariana Islands (Sept. 20, 2016) Builder 1st Class Lindsey Pfallen, left, and Lt. Alex McCorkindale, both assigned to Naval Mobile Construction Battalion (NMCB) 11, act as the opposing force while Marines assigned to 3rd Battalion, 3rd Marines conduct an island seizure during Exercise Valiant Shield 2016 in Tinian, Commonwealth of the Northern Mariana Islands (CNMI). Valiant Shield is a biennial, U.S. Air Force, Navy and Marine Corps exercise held in Guam, focusing on real-world proficiency in sustaining joint forces at sea, in the air, on land and in cyberspace. (U.S. Navy Combat Camera photo by Mass Communication Specialist 1st Class Benjamin A. Lewis/Released)