Radioactive 'Hot Spots' Detected in Tokyo, Yokohama - WSJ.com

Radioactive 'Hot Spots' Detected in Tokyo, Yokohama - WSJ.com: TOKYO—"Japanese researchers discovered high levels of radioactive material in concentrated areas in Tokyo and Yokohama, more than 241 kilometers away from the Fukushima Daiichi nuclear plant, as increasingly thorough tests provide a clearer picture of just how far contamination has spread and accumulated after the March disaster."