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

The U.S. Navy is transforming a costly flub into a potent weapon with the first shipborne hypersonic weapon, which is being retrofitted aboard the first of its three San Diego-based stealthy destroyers.

The US Navy is to transform three, white elephant, stealth destroyers by fitting them with first-of-their-kind shipborne hypersonic weapons.The USS

The U.S. Navy is transforming a costly flub into a potent weapon with the first shipborne hypersonic weapon, which is being retrofitted aboard the first of its three stealthy destroyers.