Secretary of Defense Robert Gates speaks to troops in Kandahar province, Afghanistan. Jason Reed/Pool/Getty Images hide caption

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In this photo provided by ISAF Regional Command (South), members of Provincial Reconstruction Team Zabul and 1st Stryker Brigade Combat Team, 25th Infantry Division, make their way to the Zabul Juvenile Detention Facility on Wednesday in Qalat, Afghanistan. The effect of al-Qaida leader Osama bin Laden's death on the Afghan insurgency is yet to be seen. Brian Ferguson/U.S. Air Force/AP hide caption

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