The Nuclear Crisis in Fukushima Japan

Photograph: DigitalGlobe/AFP/Getty Images

The nuclear crisis in Japan escalated as a third explosion in four days rocked the struggling power plant in the country's stricken north-east, according to its nuclear safety watchdog. Tokyo had already called in international help to tackle the escalating crisis.

Non-essential technicians were evacuated from the facility after radiation levels around the Fukushima No 1 power plant briefly rose four-fold in the wake of the blast, which appears to be the most serious to date.

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