The Defense Department is looking to step up its development of hypersonic weapons — missiles that travel more than five times faster than the speed of sound — DOD leaders said at the National Defense Industrial Association-sponsored "Hypersonics Senior Executive Series" here today."
In 2018, China has tested more hypersonics weapons than we have in a decade," said Michael Griffin, undersecretary of defense for research and engineering. "We've got to fix that."
Russia also is involved in hypersonics, Griffin said. "Hypersonics is a game changer," he added.