Japan says must review nuclear power policy as crisis persists

Radiation particles have been found as far away as Iceland, and although Japan insists levels are not dangerous to adults, it is the nation's most testing time since world War Two.

The estimated $300 billion damage from the 9.0 magnitude earthquake and ensuing tsunami makes it the world's costliest natural disaster, dwarfing Japan's 1995 Kobe quake and Hurricane Katrina, which swept through New Orleans in 2005.

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