IAEA Chief: Japan Nuclear Situation 'Very Serious'

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Developments at a damaged nuclear reactor in Japan are "very serious," the U.N. nuclear watchdog chief said on Wednesday as he prepared to head to the country to assess the situation.

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Yukiya Amano said he hoped to fly to Japan on Thursday for a one-day trip and needed more information from authorities there.

"The situation ... is very serious," Amano, a Japanese national, told a news conference, saying damage to the core of three units at the Fukushima Daiichi nuclear reactor had been confirmed.