FILE - In this March 13, 2011 file photo, residents evacuated from areas surrounding the Fukushima nuclear facilities damaged by the March 11 massive earthquake and tsunami react during a check for radiation contamination in Koriyama city, Fukushima prefecture, Japan. Influential Japanese scientists who help set national radiation exposure limits have for years had trips paid for by the country’s nuclear plant operators to attend overseas meetings of the world’s top academic group on radiation safety. Some of these same scientists have consistently given optimistic assessments about the health risks of radiation, interviews with the scientists and government documents show. Their pivotal role in setting policy after the March 2011 tsunami and ensuing nuclear meltdowns meant the difference between schoolchildren playing outside or indoors and families staying or evacuating. (AP Photo/Wally Santana, File)

Associated Press
FILE - In this March 13, 2011 file photo, residents evacuated from areas surrounding the Fukushima nuclear facilities damaged by the March 11 massive earthquake and tsunami react during a check for radiation contamination in Koriyama city, Fukushima prefecture, Japan. Influential Japanese scientists who help set national radiation exposure limits have for years had trips paid for by the country’s nuclear plant operators to attend overseas meetings of the world’s top academic group on radiation safety. Some of these same scientists have consistently given optimistic assessments about the health risks of radiation, interviews with the scientists and government documents show. Their pivotal role in setting policy after the March 2011 tsunami and ensuing nuclear meltdowns meant the difference between schoolchildren playing outside or indoors and families staying or evacuating.  (AP Photo/Wally Santana, File)
FILE - In this March 13, 2011 file photo, residents evacuated from areas surrounding the Fukushima nuclear facilities damaged by the March 11 massive earthquake and tsunami react during a check for radiation contamination in Koriyama city, Fukushima prefecture, Japan. Influential Japanese scientists who help set national radiation exposure limits have for years had trips paid for by the country’s nuclear plant operators to attend overseas meetings of the world’s top academic group on radiation safety. Some of these same scientists have consistently given optimistic assessments about the health risks of radiation, interviews with the scientists and government documents show. Their pivotal role in setting policy after the March 2011 tsunami and ensuing nuclear meltdowns meant the difference between schoolchildren playing outside or indoors and families staying or evacuating. (AP Photo/Wally Santana, File)
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