10 of 46: Police officers wearing gas masks patrol in the area of the Fukushima power plant's Unit 1 in Okumamachi, Fukushima Prefecture (state), northern Japan, Saturday, March 12, 2011, amid fears that a part of the plant could meltdown after being hit by a powerful earthquake and tsunami Friday. (AP Photo/The Yomiuri Shimbun, Kaname Yoneyama)

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