The Des Moines-class cruisers were a trio of very large U.S. Navy heavy cruisers commissioned in 1948 and 1949. They were the last of the all-gun heavy cruisers, exceeded in size in the American navy only by the 30,000 long tons (30,481 t) Alaska-class cruisers that straddled the line between heavy cruiser and battlecruiser. Two were decommissioned by 1961, but one, Newport News (CA-148), served until 1975. USS Salem is a museum ship in Quincy, Massachusetts; the other two ships were scrapped.