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The Unit 2 (left to right) Unit 3 and Unit 4 reactor buildings stand at Tokyo Electric Power Co.'s (TEPCO) Fukushima Dai-ichi nuclear power plant in Okuma, Fukushima, Japan, on February 23, 2017. / AFP / POOL / Tomohiro Ohsumi (Photo credit should read TOMOHIRO OHSUMI/AFP/Getty Images)

The Unit 2 (left to right) Unit 3 and Unit 4 reactor buildings stand at Tokyo Electric Power Co.'s (TEPCO) Fukushima Dai-ichi nuclear power plant in Okuma, Fukushima, Japan, on February 23, 2017. / AFP / POOL / Tomohiro Ohsumi        (Photo credit should read TOMOHIRO OHSUMI/AFP/Getty Images)