Policemen maintain order as customers wait outside a store called "Japanese Milk Powder" before it opens in Hong Kong March 16, 2011. Hundreds of people in the territory, worrying that future Japanese baby products will be contaminated by radiation, have lined up for milk powder. Radioactive materials spewed into the air by Japan's earthquake-crippled nuclear plant may contaminate food and water resources, with children and unborn babies most at risk of possibly developing cancer. REUTERS/Bobby Yip (CHINA - Tags: BUSINESS HEALTH DISASTER)