In this photo released by Tokyo Electric Power Co. (TEPCO), gray smoke rises from Unit 3 of the tsunami-stricken Fukushima Dai-ichi nuclear power plant in Okumamachi, Fukushima Prefecture, Japan, on Monday, March 21, 2011. Officials said that TEPCO temporarily evacuated its workers from the site. At left is Unit 2 and at right is Unit 4. (AP Photo/Tokyo Electric Power Co.)
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