A U.S. Navy Gunner's Mate First Class Carrick N. Thomas passing a clip of four 40 mm rounds through a hatch in a 40 mm handling room aboard the battlecruiser USS <i>Alaska</i> (CB-1). Note the green, red, and white color coding on the projectiles, the room's white paint, and the red battle lamp. Photographed on 6 March 1945 during the Iwo Jima operation.
USN
Official U.S. Navy photo <a rel="nofollow" class="external text" href="http://www.history.navy.mil/photos/images/k03000/k03733c.htm">80-G-K-3733</a> from the U.S. Navy <a rel="nofollow" class="external text" href="http://www.history.navy.mil">Naval History and Heritage Command</a>