Chinese Embassy Deputy Chief of Mission Xie Feng (L), Assistant Secretary of Homeland Security for US Immigration, and Customs Enforcement John Morton (C) and Customs and Border Protection Assistant Commissioner for International Affairs Allen Gina stand behind a fossilized saber-toothed cat skull during a repatriation ceremony for US Department of Homeland Security officials to turn over bones and eggs of pre-historic animals shipped illegally from China to the US, at the Chinese Embassy in Washington September 14, 2009.[Agencies]