A pro-Islamic human rights group chants slogans as they call for the removal of Syrian president Bashar al Assad and his regime during a demonstration outside the Syrian Embassy in Ankara. Adem Altan/AFP/Getty Images hide caption

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Policemen stand guard outside the compound used as a hideout by Osama bin Laden, the day after a U.S. raid killed the al Qaida leader in Abbottabad, Pakistan. Aamir Qureshi/AFP/Getty Images hide caption

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A researcher works at the Wuhan National Laboratory for Optoelectronics in central China's Hubei province on June 9. Beijing's spending on research and development has increased over the past few years in an effort to re-establish the country's scientific prowess. AFP/Getty Images hide caption

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Members of a pro-Islamic human rights group hold up a sign that reads "We remember Hama" during a protest against the Syrian regime Monday in Ankara, Turkey. Adem Altan/AFP/Getty Images hide caption

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A tent camp has been set up on the promenade that lines Rothschild Boulevard, one of Tel Aviv's most expensive residential streets. Uriel Sinai/Getty Images hide caption

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Neil Johnson, a University of Miami physicist, developed this mathematical formula to predict insurgent attacks in war zones. Courtesy of Neil Johnson hide caption

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African Union and Somali troops launch an attack on al-Shabaab, a militant group linked to al-Qaida, in Mogadishu, Somalia, on Thursday in an effort to protect famine relief efforts, officials said. The World Food Program says it cannot reach 2.2 million people in need of aid in the militant-controlled areas in southern Somalia because of insecurity. AP hide caption

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