Sudan, one of four endangered northern white rhinoceroses shipped to Kenya from a zoo in the Czech Republic, explores his new pen at the Ol Pejeta reserve near the town of Nanyuki in central Kenya. Tony Karumba/AFP/Getty Images hide caption

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Gay rights demonstrators protest outside the Uganda High Commission on Thursday in London. Proposed legislation would impose the death penalty for some gay Ugandans, while family and friends could face up to seven years in jail if they fail to report them to authorities. Matt Dunham/AP hide caption

itoggle caption Matt Dunham/AP

Archbishop Desmond Tutu speaks during an Oxfam International climate hearing in Copenhagen on Tuesday. He is among the African leaders sounding the alarm that Africa will suffer most from the effects of climate change. Attila Kisbendek/AFP/Getty Images hide caption

itoggle caption Attila Kisbendek/AFP/Getty Images