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Japan tsunami
Workers in Japan are struggling to contain the crisis at the Fukushima Daiichi nuclear power plant, which was badly damaged by a devastating earthquake and tsunami on March 11.

How do reactors work, what's causing the problems and what's being done to get it under control?

Hiroshima survivor's take

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Get the latest news after a magnitude 9.0 earthquake hit northern Japan last week, triggering tsunamis that caused widespread devastation and crippled a nuclear power plant.

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