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Health workers in full protective gear transfer the killed chickens from a bin to rubbish bags as they started culling all chickens by using carbon dioxide at a wholesale poultry market in Hong Kong, Wednesday, Dec. 31, 2014. Authorities in Hong Kong have begun destroying 15,000 chickens at a poultry market and suspended imports from mainland China after bird flu was found in some birds. (AP Photo/Kin Cheung)