Vice Chairman of the Joint Chiefs of Staff Gen. John Hyten, reacting to news that China has conducted a hypersonic missile test that reportedly caught U.S. military officials off guard, said today many of the facts remain classified but are "very concerning," if for no other reason than Beijing has conducted "hundreds" of similar tests in about the past five years, while the United States has completed only nine. "A test did occur," he told reporters at a breakfast in...