Hillary Rodham Clinton Hillary Rodham Clinton

Hillary Clinton is running with all the advantages and challenges of someone who has been in the public eye for more than two decades. Andrew Burton/Getty Images hide caption

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Andrew Burton/Getty Images

Former Arizona Rep. Gabrielle Giffords, accompanied by her husband, retired astronaut Mark Kelly, speaks during a news conference in Manchester, N.H., in July. They were there to encourage state political leaders to have courage in the fight to expand background checks on gun purchases. Mary Schwalm/AP hide caption

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Mary Schwalm/AP

Secretary of State Hillary Clinton (at right, in front) in a photo released today (Jan 7, 2013) by the State Department. A spokesman says it was taken around 9:15 a.m. ET at a meeting with the department's assistant secretaries. State Department hide caption

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State Department

Secretary of State Hillary Clinton on Dec. 6 in Dublin. Kevin Lamarque /AFP/Getty Images hide caption

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Kevin Lamarque /AFP/Getty Images

Libyan President Mohammed el-Megarif speaks during a memorial service in Tripoli for U.S. Ambassador to Libya, Chris Stevens, and three consulate staff killed in Benghazi on Sept. 11. Abdel Magid al-Fergany/AP hide caption

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Abdel Magid al-Fergany/AP

Chelsea Clinton in September at her father's Clinton Global Initiative in New York City. Mandel Ngan /AFP/Getty Images hide caption

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Mandel Ngan /AFP/Getty Images

On Friday and again on Saturday in Benghazi: Protesters took to the streets in opposition to the extremist militias that have operated in the city since the toppling of Moammar Gadhafi. Tariq Al-Hun /UPI /Landov hide caption

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Tariq Al-Hun /UPI /Landov