The Navy's Advanced Guns System Fires Rocket-Powered Artillery Shells

The 54-caliber, 5-inch naval artillery shells fired by Arleigh Burke-class destroyers are brutally efficient at destroying surface ships, aircraft, and land targets. But they're little more than pea shooters compared to the 6.1-inch rocket-propelled, GPS-guided shells shot by the new Zumwalt-class' Advanced Guns System.