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Participants hold candles while forming a "human chain" around Japan's parliament building during a candle light vigil against nuclear power plants in Tokyo, Sunday, March 11, 2012. Japan marked the first anniversary of the March 11 earthquake and tsunami which devastated Japan's northeast and triggered a massive nuclear power plant accident in Fukushima. (AP Photo/Junji Kurokawa)

Japan mourns tsunami dead

With a minute of silence, tolling bells and prayers, Japan marked the first anniversary of an earthquake and tsunami that killed thousands and set off a nuclear crisis that shattered public trust in atomic power and the nation's leaders.