3D printing is being used to uncover a secret part of history - a group of volunteers who work weekly to restore the battleship U.S.S North Carolina, the most decorated ship in the fleet during World War II, discovered a piece of technology on the ship that was so top-secret, it was censored and blacked out in most images at the time. The group has also been working recently on restoring the inside of the ship, which includes the interior of its three giant gun turrets, and the fire control systems inside, and made a big discovery: a system of synchro-servos, electro-mechanical devices that allowed all the turrets to be used in unison. The group wanted to demonstrate what made the battleship so advanced for its time, and turned to 3D printing. Read more at 3DPrint.com: https://3dprint.com/164668/uss-north...a-3d-printing/