Amid much speculation by private security analysts, the FBI stood by its claim this week that North Korea was responsible for the hack against Sony Pictures. Damian Dovarganes/AP hide caption

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The Rev. Martin Luther King makes a statement at the Justice Department in Washington on Dec. 1, 1964 after a meeting with FBI Director J. Edgar Hoover. Under Hoover's leadership, the FBI investigated King and his personal life for years. Bob Schutz/AP hide caption

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FBI Director James Comey says new encryption features allow people "to place themselves beyond the law." Alex Wong/Getty Images hide caption

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FBI Director James Comey testifies on Capitol Hill in Washington on Nov. 14, 2013. Speaking to reporters Thursday, Comey said he's "confused" by reports that characterize NSA contractor Edward Snowden as a "whistleblower" or a "hero." Carolyn Kaster/AP hide caption

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FBI Director James Comey is pictured earlier this month during his swearing-in ceremony at the Justice Department in Washington, D.C. Susan Walsh/AP hide caption

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Newly minted FBI Director James Comey speaks at a swearing-in ceremony last week at the Justice Department in Washington, D.C. Susan Walsh/AP hide caption

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