FILE - This Dec. 10, 2018, file photo, provided by the U.S. Missile Defense Agency (MDA),shows the launch of the U.S. military's land-based Aegis missile defense testing system, that later intercepted an intermediate range ballistic missile, from the Pacific Missile Range Facility on the island of Kauai in Hawaii. The Trump administration is considering ways to expand U.S. homeland and overseas defenses against a potential missile attack, possibly adding a layer of satellites in space to detect and track hostile targets. (Mark Wright/Missile Defense Agency via AP)
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