A sign on the pump advertises the ethanol content of the gasoline as a motorist reaches for the gas pump in his truck at a filling station in Bellmead, Texas. LM Otero/AP hide caption

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A Tunisian protester holds a baguette while taking to riot police in January 2011. Martin Bureau/AFP/Getty Images hide caption

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Somali girls line up to receive a hot meal in Mogadishu last year after the worst drought in the Horn of Africa in decades, compounded by war, put millions in danger of starvation. Roberto Schmmidt/AFP/Getty Images hide caption

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