A police officer wearing a respirator guides people to evacuate away from the Fukushima Daiichi 1 nuclear plant in Tomioka Town

A police officer wearing a respirator guides people to evacuate away from the Fukushima Daiichi nuclear plant following an evacuation order for residents who live in within a 10 km (6.3 miles) radius from the plant after an explosion in Tomioka Town in Fukushima Prefecture March 12, 2011. REUTERS/Asahi Shimbun