Facebook founder and CEO Mark Zuckerberg speaks during a news conference in August at company headquarters in Palo Alto, Calif. Justin Sullivan/Getty Images hide caption

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House Minority Leader John Boehner of Ohio holds a copy of the "Pledge To America" plan while flanked by members of Congress and small-business owners Thursday at Tart Lumber in Sterling, Va. Mark Wilson/Getty Images hide caption

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Lawrence Summers, director of the National Economic Council, says he plans to return to Harvard University at the end of the year. Chip Somodevilla/Getty Images hide caption

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Pope Benedict XVI greets schoolchildren during a Friday gathering at St. Mary's University College in Twickenham, England. Peter Macdiarmid/Getty Images hide caption

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Pope Benedict XVI replaces his "zucchetto" as he meets with Britain's Queen Elizabeth II and Prince Philip on Thursday at Holyroodhouse Palace in Edinburgh, Scotland, at the start of a historic four-day state visit. Dave Thompson/AFP/Getty Images hide caption

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U.S. Secretary of State Hillary Clinton met with Israeli President Shimon Peres on Wednesday at the Beit Hanassi presidential residence in Jerusalem. Alex Brandon/Associated Press hide caption

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Sarah Shourd, 32 (right), embraces her mother, Nora Shourd, at the royal airport in Muscat, Oman, on Tuesday after leaving Tehran, Iran. The man behind them is unidentified. Sultan al-Hasani/AP hide caption

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U.S. Secretary of State Hillary Clinton met with Israeli Prime Minister Benjamin Netanyahu (left) and Palestinian President Mahmoud Abbas on Tueday in Sharm El-Sheikh, Egypt. Alex Brandon/AFP/Getty Images hide caption

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A key piece of evidence in the Deepwater Horizon investigation — the blowout preventer — was raised to the surface on Saturday and has yet to be closely examined. The failed mechanism, along with the well cap, was put on a vessel in the Gulf. Petty Officer 1st Class Thomas M. Blue/U.S. Coast Guard/Getty Images hide caption

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Alleged Russian arms dealer Viktor Bout walks past temporary cells ahead of a hearing on Friday at the Criminal Court in Bangkok. Christophe Archambault/AFP/Getty Images hide caption

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