Defense Secretary Leon Panetta looks on at left as Joint Chiefs Chairman Adm. Michael Mullen testifies Thursday in Washington. Harry Hamburg/AP hide caption

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U.S Treasury Secretary Timothy Geithner (left) speaks to French Finance Minister Francois Baroin (right) during talks in Marseille earlier this month. The U.S. is increasingly concerned that the European debt crisis will have an impact on the U.S. economy. Lionel Cironneau/AP hide caption

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The Louis S. St Laurent icebreaker slices its way through the ice of the Northwest Passage. Jackie Northam/NPR hide caption

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A model of a surveillance drone by the French Dassault Aviation and the British BAE Systems is on display at the International Paris Air Show in June. Pierre Verdy/AFP/Getty Images hide caption

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A local resident walks Wednesday near Osama bin Laden's compound in Abbottabad, Pakistan. The U.S. raid that killed bin Laden has been a source of tension in U.S.-Pakistani relations. Aqeel Ahmed/AP hide caption

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Yemeni army soldiers, lifted by anti-government protesters, chant slogans and hold up their rifles as they celebrate President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, on Sunday. Hani Mohammed/AP hide caption

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Aircraft wreckage is seen at the Mehran Pakistani naval air base a day after militants attacked it. Rizwan Tabassum/AFP/Getty Images hide caption

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Members of the Bravo Company, 1st Battalion, 5th Marine Regiment watch as a massive dust storm is just seconds away from enveloping Patrol Base Fires in Sangin District, Helmand province, southern Afghanistan. Roughly 100,000 service members are in Afghanistan, and their future there is being newly considered in Washington after the death of Osama bin Laden in Pakistan. David Gilkey/NPR hide caption

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Bahraini police fired tear gas to disperse protesters gathered at Pearl Square in Manama on March 13. The square was the epicenter of anti-government protests. AFP/Getty Images hide caption

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The government of Israeli Prime Minister Benjamin Netanyahu, seen here during a Cabinet meeting on May 1, says it will withhold the transfer of $90 million in tax funds and customs fees for the Palestinian Authority. The move comes after news of a reconciliation deal between two key rival Palestinian factions. Baz Ratner/Pool/Getty Images hide caption

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Israeli left- and right-wing activists demonstrate in Tel Aviv on April 21, when prominent leftist Israeli intellectuals signed a petition in favor of creating a Palestinian state based on 1967 borders. Ariel Schalit/AP hide caption

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An Israeli man rides a tractor in the village of Majdal Shams in the Golan Heights, near the Israeli-Syrian border on June 1, 2007. Some worry that political unrest in Syria could threaten peace in the area. Sebastian Scheiner/AP hide caption

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