One former president, one would-be: Republican presidential nominee Mitt Romney (left), spoke this morning at former President Bill Clinton's annual forum in New York City. President Obama addresses the Clinton Global Initiative later today. Mandel Ngan /AFP/Getty Images hide caption

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People gather around a car as it is removed by a mobile crane in Tehran, Iran. The car was being driven by Iranian nuclear scientist Mostafa Ahmadi Roshan when it was targeted by a bomb Wednesday. Roshan was killed in the blast. Meghdad Madadi/AP hide caption

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Pakistani NGO workers protest at a rally on World AIDS Day in Peshawar in 2006. Tariq Mahmood/AFP/Getty Images hide caption

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