This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
railroad vehicle Lot U.S. Navy Naval Railway Battery MK. Shown Lowering inch caliber gun into the slide of the first mount. Secretary of the Navy Josephus Daniels Collection. U.S. Army Signal Corps photograph on the in the collections of the Library of Congress. Lot U.S. Navy Naval Railway Battery MK. Shown Lowering