Public domain
Aberdeen Proving Ground, Maryland. Major General Charles T. Harris, Jr., explaining the workings of the breech in a sixteen-inch gun to Congressman Andrew J. May, chairman of the House Military Affairs Committee. Mr. May saw the huge gun fired, then toured the proving ground, and examined mobile art
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineAberdeen Proving Ground, Maryland. Major General Charles T. Harris, Jr., explaining the workings of the breech in a sixteen-inch gun to Congressman Andrew J. May, chairman of the House Military Affair. 1942-01-01. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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