Bill Gates (R), Microsoft Corp co-founder and co-chair of the Bill and Melinda Gates Foundation, and Robin Li, founder and chief executive of Chinese search engine Baidu, put on shirts bearing the slogan: "Say No to Involuntary Smoking", during a media conference in Beijing June 11, 2011. Gates and Li signed an agreement to form an alliance between their charitable foundations called the "Alliance for Healthy China". [Photo/Agencies]

People watch a pig wading through water after a mudslide hits Yueyang, Central China's Hunan province, June 11, 2011. The mudslide has killed 29 people and caused 20 missing. [Photo/CFP]