Between 1941 and 1945, U.S. shipyards built more shipping tonnage than had been previously produced in the history of the world. American industrialists like Henry Kaiser transformed the nation’s shipyards into mass production facilities in a matter of months. Ships that had once taken years to build now only took weeks to construct. This record pace of producing ships is one of the most remarkable stories in the history of American industry. This episode utilizes rare color film obtained from the National Archives as well as principle photography taken on board World War II Liberty Ships and aircraft carriers that remain afloat today.