CommentGift ShareGen. Mark A. Milley, chairman of the Joint Chiefs of Staff, called China’s recent test of a hypersonic weapons system “very concerning” — and “very close” to a Sputnik moment as Beijing rapidly expands its military capabilities.Milley, the United States’ top military officer, is the first U.S. official to acknowledge the provocation publicly, telling in an interview aired Wednesday that “what we saw was a very significant event.”China’s test of the hypersonic system coincides with its broader effort to enhance strategic and nuclear weapons capabilities, developments being...…CommentGift ShareGen. Mark A. Milley, chairman of the Joint Chiefs of Staff, called China’s recent test of a hypersonic weapons system “very concerning” — and “very close” to a Sputnik moment as Beijing rapidly expands its military capabilities.Milley, the United States’ top military officer, is the first U.S. official to acknowledge the provocation publicly, telling in an interview aired Wednesday that “what we saw was a very significant event.”China’s test of the hypersonic system coincides with its broader effort to enhance strategic and nuclear weapons capabilities, developments being...WW…