171004-M-DP650-419 CASIGURAN, Aurora, Philippines (Oct. 4, 2017) Philippine and U.S. Navy seabees work on the drop ceiling for a multipurpose building during construction at Esperanza Elementary School in support of exercise Kamandag, a Philippines-led military exercise is to conduct bilateral exchanges between Philippine and U.S. forces. (U.S. Marine Corps photo by Sgt. Matthew J. Bragg/Released)