Patriot missiles PAC-3 launchers are seen at the Kadena U.S. Air Base in Okinawa, southern Japan, Friday, Feb. 9, 2007. The deployment is part of a multibillion dollar effort to build a ballistic missile shield in the Pacific to counter the threat of an attack by North Korea, which shocked the region last July with a series of missile tests and then again in October with the announcement of its first nuclear test. (AP Photo/Itsuo Inouye)

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