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Hector, a member of the United Nations K-9 (Canine) Unit, sits next to a can after he detected explosives during a demonstration at the UN headquarters in New York, Oct. 13, 2017. The United Nations is the diplomatic center of the world and its headquarters in New York is guarded by a group of Labradors and their handlers called K-9 (Canine) Unit. The black Labrador named Hector is one of the special "security officers". There are 10 officers and each of them has a Labrador in the K-9 (Canine) Unit. They work together to ensure the safety of the United Nations. (Xinhua/Li Muzi)
