U.S. Air Force Senior Airman Tyler Preston, an engineer with 18th Civil Engineering Squadron, and Philippine Navy Fireman 2nd Class Michal Argete, an engineer with 3rd Naval Combat Engineering Battalion, apply stucco to a wall of a 2-classroom school building at Luga Elementary School, Santa Teresita, Cagayan, Philippines, Apr. 30, 2018, during Exercise Balikatan. Exercise Balikatan, in its 34th iteration, is an annual U.S.-Philippine military training exercise focused on a variety of missions, including humanitarian assistance and disaster relief, counterterrorism, and other combined military operations held from May 7 to May 18. (U.S. Marine Corps photo by Sgt. Scott P. Smolinski)