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From the Smithsonian Channel

This Aircraft Carrier Cannon Fires 4,500 Rounds a Minute

The Sea Wiz is the affectionate nickname given to a 20mm Vulcan Cannon on board the USS George H.W. Bush aircraft carrier. It fires 4,500 rounds a minute, can hit a target five miles away and has bullets that are twice the normal size.

Smithsonian magazine   |   1:47