Japan's nuclear crisis

As Japan's nuclear emergency continues, some food produced near the stricken Fukushima power plant has been found to contain abnormal radiation levels. Radiation traces have also been found in tap water in Tokyo and it's been detected in the air as far away as eastern Russia and the west coast of the US. What will be the health effects? Does the disaster prove nuclear power is inherently unsafe? Paul Barclay hosts the discussion this week. Photo: AFP Digital Globe