The Japanese Prime Minister, Naoto Kan, says the country is facing its worst crisis since the Second World War as it struggles to cope with a nuclear emergency and the devastation caused by Friday's earthquake and tsunami.

The city of Sendai, home to a million people, stands on the cusp of destruction. To the north stretches the area devastated by the tsunami. On either side stand the nuclear power stations which are yet to be stabilised.

Today presenter James Naughtie reports from the city "caught between the normal and horrific".

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