170202-M-AR450-1552 RAYONG, Thailand (Feb. 2, 2017) Petty Officer 3rd Class Douglas Caspersen, assigned to Naval Mobile Construction Battalion 5, hammers a block during the construction of a classroom at Ban Nong Muong School in Rayong, Thailand, during exercise Cobra Gold. The exercise is in its 36th iteration, focusing on humanitarian civic action, community engagement, and medical activities to support the needs and humanitarian interest of civilian populations around the region. (U.S. Marine Corps photo by Cpl. Wesley Timm/Released)