Former Attorney General Dick Thornburgh, shown here in 2010, is one former Justice Department official supporting the case of an Albanian witness asking for government protection. Chip Somodevilla/Getty Images hide caption

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Attorney General Eric Holder Nicholas Kamm/AFP/Getty Images hide caption

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The Securities and Exchange Commission headquarters in Washington. AP hide caption

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This image provided by the Drug Enforcement Administration shows Russian arms trafficking suspect Viktor Bout in U.S. custody after being extradited and flown from Bangkok to New York to face terrorism charges. DEA/AP hide caption

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A shortage of a key drug for lethal injections has slowed the pace of executions. Nate Jenkins/AP hide caption

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A man is pulled off a commuter train at the Civic Center BART station on July 11 in San Francisco after climbing on top of it during a protest against the July 3 shooting by transit police of Charles Blair Hill. On Thursday, BART officials blocked cell service in some stations to prevent another protest. Eric Risberg/AP hide caption

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Justice Sonia Sotomayor, shown with President Obama in this file photo, became the first Hispanic Supreme Court justice during the Obama administration, one of a number of judicial diversity milestones the White House has made. Jewel Samad/AFP/Getty Images hide caption

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A photo taken in January shows part of a cache of seized weapons displayed at a news conference in Phoenix. In July, the Justice Department announced new rules requiring gun dealers to report multiple sales of semi-automatic rifles. Matt York/AP hide caption

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U.S. Sen. Charles Grassley (R-IA) has warned the Justice Department not to punish insiders who talk to Congress about the "Fast and Furious" operation. Susan Walsh/AP hide caption

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Ryan Cook reaches for a jar of medical marijuana at one of his clinics in Denver on June 24. Ed Andrieski/AP hide caption

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