Secretary of State Hillary Clinton calls a time-out during a multi-part question from an Indian journalist, as India's Foreign Minister S.M. Krishna smiles during their news conference at the US-India Strategic Dialogue in Washington in 2012.
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Pablo Martinez Monsivais/AP
Secretary of State Hillary Rodham Clinton testifies on Capitol Hill in 2013 on the deadly attack on the US diplomatic mission in Benghazi, Libya, that killed Ambassador Chris Stevens and three other Americans.
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Actress Meryl Streep takes a selfie with Secretary of State Hillary Rodham Clinton following the State Department Dinner for the Kennedy Center Honors gala at the State Department, in Washington, in 2012.
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Chuck Kennedy/The White House
President Obama has lunch with former Secretary of State Hillary Rodham Clinton on the patio outside the Oval Office on July, 2013.
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Cory Morse/The Grand Rapids Press/AP
Supporters of former Secretary of State Hillary Rodham Clinton stand outside DeVos Place where she was scheduled to speak at the Economic Club of Grand Rapids' annual dinner in 2013.
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Hillary Rodham Clinton holds her memoir "Hard Choices" at Bunch of Grapes Bookstore, in Vineyard Haven, Mass., on the island of Martha's Vineyard, during a book signing event in 2014. Clinton's split with President Barack Obama over a foreign policy "organizing principle" isn't likely to be the last time differences emerge between the two.
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Secretary of State Hillary Rodham Clinton works from a desk inside a C-17 military plane upon her departure from Malta, in the Mediterranean Sea, bound for Tripoli, Libya in 2011. When Clinton joined Twitter, she described herself as a 'pantsuit aficionado' and a 'hair icon.'
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Secretary of State Hillary Rodham Clinton, President Barack Obama, Vice President Joe Biden, Secretary of Defense Robert Gates and members of the national security team watch an update of the mission against Osama bin Laden in the White House Situation Room in 2011.
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US Secretary of State Hillary Rodham Clinton attends the 'Friends of Syria' international conference in Paris, in 2012, as the United States was proposing new sanctions on Syrian President Bashar Assad's regime.
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Democratic presidential hopeful, Sen. Hillary Rodham Clinton reacts as she takes the stage with her daughter, Chelsea, at a rally in Nashua, N.H., in 2008.
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Pablo Martinez Monsivais/AP
US President Barack Obama watches as Myanmar democracy activist Aung San Suu Kyi (c.) greets US Secretary of State Hillary Rodham Clinton at her residence in Yangon, Myanmar, in 2012.
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Petr David Josek/AP
Former US President Bill Clinton, flanked by his wife, US Secretary of State Hillary Clinton, and Madeleine Albright, during the state funeral of former Czech President Vaclav Havel in the St. Vitus Cathedral in Prague, Czech Republic, in 2011.
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Secretary of State Hillary Clinton participates in an arrival ceremony at Rarotonga International Airport in Rarotonga, Cook Islands, in 2012.
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First lady Michelle Obama and Secretary of State Hillary Rodham Clinton share a laugh as they present the 2010 International Women of Courage Awards at the State Department in Washington.
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Democratic presidential hopeful Sen. Hillary Rodham Clinton shops for eyeglasses during a campaign stop in Louisville, Ky., in 2008.
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US Secretary of State Hillary Rodham Clinton waves upon arrival in Moscow's Vnukovo airport in 2010. Hillary Rodham Clinton met with senior Russian officials and to joined top international diplomats in assessing the stalled Mideast peace process.
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Former Secretary of State Hillary Clinton speaks, with Elton John (r.) and his partner David Furnish (l.) looking on, after receiving her Founders award during the Elton John AIDS Foundation's 12th Annual "An Enduring Vision" benefit gala, in New York, in 2013.
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Manuel Balce Ceneta/AP
House Speaker Nancy Pelosi of Calif., hugs Secretary of State Hillary Rodham Clinton, as Environmental Protection Agency Administrator Lisa Jackson applauds at left, in Statuary Hall on Capitol Hill during the Women History Month celebration in 2010.