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:
monochrome Gun crew on the . antiaircraft gun located on the flight deck of USS Enterprise CV is ready for the moment when the word Commence Firing is passed. Photograph released April . Official U.S. Navy photograph now in the collections of the National Archives. Gun crew on the . antiaircraft gun located on the flight deck