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In this photo taken on Oct. 26, 2010, and released by the Chinese Navy on Sunday, Oct. 27, 2013, a Chinese navy nuclear submarine takes part in a nuclear safety drill at the Qingdao submarine base in east China's Shandong province. In a sign of growing confidence, China's navy gave Chinese media on Sunday unprecedented publicity on its first nuclear submarine fleet, one of its most secretive military programs. China is devoting increasing resources to its naval forces to safeguard its maritime interests and assert its territorial claims. (AP Photo)

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