US

The Navy is putting the finishing touches on a 32-foot barrel gun with 4,500 mph firepower

The US Navy is testing a railgun they have invested $500 million in — and they plan to invest an additional $800 million. Military planners say the barrel gun “would be useful if the US had to defend the Baltic states against Russia or support an ally against China in the South China Sea.”

Produced by Emma Fierberg

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