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After years of stopstart development of hypersonics U.S. is now trying to accelerate testing and deployment to match China and Russia according to senior After years of stopstart development of hypersonics the U.S. is now trying to accelerate testing and deployment to match China and Russia according to senior Pentagon officials NegativeZHUHAI China China is leading the U.S. in a race to deploy hypersonic missiles that would defeat existing air defense systems according to senior U.S. officials http://www.reuters.com/places/chinahttps://www.reuters.com/article/us-china-army-hypersonic/china-leads-u-s-on-potent-super-fast-missiles-idUSKCN1S11E62019-04-26