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Japan Nuclear Plant Leak

The Fukushima Dai-ichi nuclear plant in northeast Japan on Tuesday, March 15, 2011. (Credit: DigitalGlobe)

Radiation From Japan Spiked In California In March

A spike in radioactive sulfur from an earthquake-damaged Japanese nuclear plant was detected in California in late March, but researchers have determined that it posed no threat to health.

CBS San Francisco–08/15/2011