Some of the destruction at the scene of Friday's car bombing in Beirut. AFP/Getty Images hide caption

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President Obama, speaking on Saturday night, said the interim deal on Iran's nuclear program is an important first step. The Obama administration is currently working on several major initiatives in the Middle East. Pool/Getty Images hide caption

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In the northern Syrian city of Aleppo last month, there was a class about how to protect against chemical weapons attacks. J.M. Lopez/AFP/Getty Images hide caption

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On Dec. 23, 1973, cars formed a double line at a gas station in New York City. The Arab oil embargo caused gas shortages nationwide and shaped U.S. foreign policy to this day. Marty Lederhandler/AP hide caption

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Two Iranian textile merchants wait for customers in Tehran's main bazaar. President Hassan Rouhani has raised hopes by reaching out to the West and promising to work for an end to sanctions. But his team has cautioned that the country's economic problems have deep roots. Vahid Salemi/AP hide caption

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A Free Syrian Army soldier stands on a Syrian military tank in front of a damaged mosque in the Syrian town of Azaz in September 2012. A different rebel group, an al-Qaida offshoot, took over the town on Wednesday. Hussein Malla/AP hide caption

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U.S. forces transfer a missile for a fighter plane as the military prepared for war in Iraq, in Saudi Arabia in 1990. American presidents have been calling on the military frequently since the end of the Cold War more than two decades ago. Gerard Fouet/AFP/Getty Images hide caption

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Ammunition was stacked up Saturday in an area near Damascus that is controlled by forces loyal to President Bashar Assad. Khaled al-Hariri /Reuters /Landov hide caption

itoggle caption Khaled al-Hariri /Reuters /Landov

Former Egyptian President Hosni Mubarak was released from prison on Thursday and put under house arrest at a military hospital. Amr Abdallah Dalsh /Reuters/Landov hide caption

itoggle caption Amr Abdallah Dalsh /Reuters/Landov

Secretary of State John Kerry leaves the West Wing of the White House with chief negotiators, Israeli Justice Minister Tzipi Livni (back to camera), Palestinian negotiator Saeb Erekat (right) and others, after a meeting with President Obama on Tuesday. Brendan Smialowski /AFP/Getty Images hide caption

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Egyptian soldiers stand guard outside the Republican Guard building in Cairo on Friday. Egyptian troops clashed with mostly Islamist protesters demanding the restoration of the ousted president, Mohammed Morsi. Khalil Hamra/AP hide caption

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Jordanian protesters chant slogans against corruption during a March 15 anti-government demonstration in Amman. Jordanians have held Arab Spring-inspired protests since 2011, demanding political reforms and anti-corruption measures. The protests have been peaceful. Khalil Mazraawi/AFP/Getty Images hide caption

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