History: USS Missouri (BB-63) conducting air defense drills. Note the 40-mm quad mount atop #2 Turret and the deck mounted single 20-mm mounts. An air defense officer and lookout in the foreground are viewing the results. 1945. [1600 x 1262]

https://i.redd.it/izj1lqsjicb01.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/7rvksb/uss_missouri_bb63_conducting_air_defense_drills/?utm_source=ifttt