11 of 16: Haui-San, front, a Clouded Leopard cub, plays with his leash as his brother Niki-San looks off behind, during a garden walk at the San Diego Zoo Wednesday, Jan. 16, 2013, in San Diego. The cubs, both about five months old, are undergoing training before interacting with the public. (AP Photo/Gregory Bull) (AP Photo/ Gregory Bull)

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