A paramilitary policeman takes in oxygen after carrying bleaching powder and disinfectant while caustic smoke billowed in a chemical reaction near a refugee camp in earthquake-hit Leigu Town of Beichuan County, Sichuan province May 29, 2008. The relief goods, including more than 10 tons of bleaching powder and disinfectant, reacted after being soaked by overnight rains, producing caustic smoke, a witness said. REUTERS/Bo Bor (CHINA)
REUTERS/BO BOR