Cranes move materials at a construction site in central Baghdad in May. The U.S. government has spent more than $770 billion on private contractors in Afghanistan and Iraq since the wars began. U.S. prosecutors increasingly are targeting bribery schemes, but their efforts have been criticized for employing strong-arm tactics designed for terrorism cases. Ali Al-Saadi/AFP/Getty Images hide caption

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Members of the Outlaws motorcycle club pass a roadblock as they ride through Hollis Center, Maine. Club members gathered for a memorial service for Thomas Mayne, a club leader who was killed during a shootout with federal agents on June 15. ATF agents were trying to arrest Mayne in his home in Old Orchard Beach, Maine. Joel Page/AP hide caption

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Senate Judiciary Chairman Patrick Leahy (right) talks with ranking Republican Sen. Jeff Sessions during the committee's vote on the confirmation of Supreme Court nominee Elena Kagan on Tuesday. Alex Brandon/AP hide caption

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President Obama and Attorney General Eric Holder in the Rose Garden of the White House in Washington on May 14. Their close relationship has sparked concerns about the distance between the White House and the Justice Department. Susan Walsh/AP hide caption

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Supreme Court nominee Elena Kagan answers questions from members of the Senate Judiciary Committee on the second day of her confirmation hearings on Capitol Hill. Mark Wilson/Getty Images hide caption

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