FBI Director Robert Mueller is sworn in on on Capitol Hill in Washington, Thursday, June 13, 2013, prior to testifying before the House Judiciary Committee as it holds an oversight hearing on the FBI. Mueller is near...

FBI Director Robert Mueller is sworn in on on Capitol Hill in Washington, Thursday, June 13, 2013, prior to testifying before the House Judiciary Committee as it holds an oversight hearing on the FBI. Mueller is nearing the end of his 12 years as head of the law enforcement agency that is conducting high-profile investigations of the Boston Marathon bombings, the attacks in Benghazi, Libya, and leaks of classified government information. The committee's chairman, Rep. Bob Goodlatte, R-Va., said when it comes to national security leaks, it's important to balance the need to protect secrecy with the need to let the news media do their job. (AP Photo/J. Scott Applewhite)

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