FILE - In this March 24, 2011 file photo taken by a small unmanned drone and released by AIR PHOTO SERVICE, damaged Unit 3, left, and Unit 4 of the tsunami-crippled Fukushima Dai-ichi nuclear power ... more 
FILE - In this March 24, 2011 file photo taken by a small unmanned drone and released by AIR PHOTO SERVICE, damaged Unit 3, left, and Unit 4 of the tsunami-crippled Fukushima Dai-ichi nuclear power plant are seen in Okuma, Fukushima prefecture, northern Japan. Japanese nuclear regulators trusted that the reactors at Fukushima Dai-ichi were safe from the worst waves an earthquake could muster based on a single-page memo from the plant operator nearly a decade ago. The towering waves unleashed by the magnitude-9.0 earthquake on March 11 destroyed backup generators for several reactors' cooling systems, and the nuclear cores in three reactors melted, sparking the worst atomic crisis the world since Chernobyl. Workers have yet to bring the plant under control more than two months later. less 
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Associated Press | Photo By AIR PHOTO SERVICE, File
Fri, May 27, 2011 6:53 AM EDT