How dangerous is Japan's nuclear leak?

An aerial view shows the quake-damaged Fukushima nuclear power plant in the Japanese town of Futaba, Fukushima prefecture on March 12, 2011. Japan scrambled to prevent nuclear accidents at two atomic plants where reactor cooling systems failed after a massive earthquake, as it evacuated tens of thousands of residents. Tokyo Electric Power, which runs the plants, said it had released some radioactive vapour into the atmosphere at one plant to relieve building reactor pressure, but said the move posed no health risks. AFP PHOTO / JIJI PRESS        (Photo credit should read JIJI PRESS/AFP/Getty Images)

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    How dangerous is Japan's nuclear leak?

Former nuclear power plant operator Michael Friedlander talks about the repercussions of the latest leak at Fukushima.