From Harris Grade Road north of Lompoc, Calif., spectators watch an interceptor missile launch from an underground silo at Vandenberg Air Force Base, and fly toward an intercontinental-range missile fired from a test range on Kwajalein Atoll in the Pacific. Hit or miss, the Pentagon's attempt on Tuesday, May 30, 2017, to shoot down a mock warhead over the Pacific Ocean marks an important milestone for an oft-criticized defense program that could be what stands between an incoming North Korean strike and the United States. (Len Wood /The Santa Maria Times via AP)
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