The U.S. is working to catch up with Russia and China in developing hypersonic weapons that travel beyond Mach 5.

The US Navy is to transform three, white elephant, stealth destroyers by fitting them with first-of-their-kind shipborne hypersonic weapons. The USS Zumwalt is at a Mississippi shipyard where workers have installed missile tubes that replace twin turrets from a gun system that was never activated because it was too expensive.

Stealth destroyer to be home for first hypersonic weapon on a US warship - The US Navy is making progress in deploying its first shipborne hypersonic weapon

Recent tests of the advanced weapons by both Russia and China have increased pressure on the US military to hasten their production.