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Col. John F. Miniclier, left, and Sgt. 1st Class Edgar R. Fox, both retired Marines who served at the Battle of Midway, examine a message routing switchboard during their tour of the former Station Hypo in Building #1 of the Pearl Harbor Naval Shipyard and Intermediate Maintenance Facility, June 2, 2017. The message routing board is one of the few remaining relics of the apparatus from Station Hypo, which deciphered the Japanese Imperial Navy code leading to the U.S. victory at the Battle of Midway June 4-6, 1942. The retired Marines were among a small group who toured the site of Station Hypo following a ceremony commemorating the 75th anniversary of the victory at Midway, often considered the turning point of the war in the Pacific.