Missouri River History Museum: (NE) The Missouri Historical Society maintains a library, archival, photographic, and objects collections that document the history of St. Louis, the State of Missouri, and the Louisiana Purchase Territory.

USS Marlin (submarine): (NE) Omaha - The USS Marlin launched on October 14, 1953 and placed in service on 29 November the same year. Designed and classified as a target submarine, Marlin's mission was to act as a target for our anti-submarine forces, and to develop tactics for our submarines to avoid enemy ASW vessels. It is interesting to note that their general hull design is quite similar to that of the USS Holland, the first submarine accepted by the US Navy.