United States Central Intelligence Agency

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John O. Brennan answers questions from senators Thursday about drones, media leaks and other matters during his confirmation hearing to be CIA director. (Andrew Harnik/The Washington Times)

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John O. Brennan answers questions from senators Thursday about drones, media leaks and other matters during his confirmation hearing to be CIA director. (Andrew Harnik/The Washington Times)

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John O. Brennan answers questions from senators Thursday about drones, media leaks and other matters during his confirmation hearing to be CIA director. (Andrew Harnik/The Washington Times)

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John O. Brennan answers questions from senators Thursday about drones, media leaks and other matters during his confirmation hearing to be CIA director. (Andrew Harnik/The Washington Times)

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Anti-war protesters yell and hold signs as John O. Brennan arrives to testify before the Senate Select Committee on Intelligence at a hearing on Capitol Hill in Washington on Thursday, Feb. 7, 2013, on his nomination to head the Central Intelligence Agency. (Andrew Harnik/The Washington Times)

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John O. Brennan arrives to testify before the Senate Select Committee on Intelligence at a hearing on Capitol Hill in Washington on Thursday, Feb. 7, 2013, on his nomination to head the Central Intelligence Agency. (Andrew Harnik/The Washington Times)

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An anti-war protester is removed as John O. Brennan arrives to testify before the Senate Select Committee on Intelligence at a hearing on Capitol Hill in Washington on Thursday, Feb. 7, 2013, on his nomination to head the Central Intelligence Agency. (Andrew Harnik/The Washington Times)

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John O. Brennan (center) arrives to testify before the Senate Select Committee on Intelligence at a hearing on Capitol Hill in Washington on Thursday, Feb. 7, 2013, on his nomination to head the Central Intelligence Agency. (Andrew Harnik/The Washington Times)

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Sen. Mark R. Warner (left), Virginia Democrat, arrives to offer introductory remarks for John O. Brennan before the Senate Select Committee on Intelligence at a hearing on Capitol Hill in Washington on Thursday, Feb. 7, 2013, on Mr. Brennan's nomination to head the Central Intelligence Agency. (Andrew Harnik/The Washington Times)

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An anti-war protester is removed as John O. Brennan testifies before the Senate Select Committee on Intelligence at a hearing on Capitol Hill in Washington on Thursday, Feb. 7, 2013, on his nomination to head the Central Intelligence Agency. (Andrew Harnik/The Washington Times)

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John O. Brennan returns to a room emptied of spectators to continue his opening remarks, which were interrupted by anti-war protesters as he testified before the Senate Select Committee on Intelligence at a hearing on Capitol Hill in Washington on Thursday, Feb. 7, 2013, on his nomination to head the Central Intelligence Agency. (Andrew Harnik/The Washington Times)

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John O. Brennan testifies before the Senate Select Committee on Intelligence at a hearing on Capitol Hill in Washington on Thursday, Feb. 7, 2013, on his nomination to head the Central Intelligence Agency. (Andrew Harnik/The Washington Times)

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John O. Brennan testifies before the Senate Select Committee on Intelligence at a hearing on Capitol Hill in Washington on Thursday, Feb. 7, 2013, on his nomination to head the Central Intelligence Agency. (Andrew Harnik/The Washington Times)

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Anti-war protesters yell and hold signs as John O. Brennan arrives to testify in front of the United States Senate Select Committee on Intelligence at a hearing on his nomination to be Director of the Central Intelligence Agency on Capitol Hill, Washington, D.C., Thursday, February 7, 2013. (Andrew Harnik/The Washington Times)

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** FILE ** Sen. Dianne Feinstein (right), California Democrat and chairman of the Senate Intelligence Committee, meets with CIA Director-nominee John Brennan (left), currently assistant to the president for homeland security and counterterrorism, on Capitol Hill in Washington on Thursday, Jan. 31, 2013. (AP Photo/Pablo Martinez Monsivais)

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Jessica Chastain earned an Oscar nomination for best actress for her portrayal of a young, obsessed CIA operative driving the search for Osama bin Laden in Columbia Pictures' new thriller "Zero Dark Thirty." (Columbia Pictures)