160323-N-ZZ999-302 WASHINGTON (March 23, 2016) The U.S. Navy tugboat USS Conestoga (AT 54) is seen in its last known broadside photograph taken likely during WWI when the tugboat was equipped with a 3-inch/50-caliber naval gun and two machine guns. The tugboat was later equipped with only a single 3-inch/50-caliber gun when it disappeared while en route from Mare Island to America Samoa, by way of Pearl Harbor in 1921. (U.S. Navy photo/Released)