Top is Department of Defense (USMC) Photo A190273 while the bottom is Department of Defense (USMC) Photo A190685.
a Marine infantryman takes a brief nap in his covered overhead hunker,
protecting him from incoming artillery and mortar rounds. Be/on: the
photograph is an overrieu' of the 1st Battalion, 26th Marines hunker
defenses along the western perimeter of the base. The Marines had come
under criticism for not "digging in."