December 2013: A Tunisian boy waves a flag as he runs at a rally in Tunis, marking the third anniversary of Tunisia's revolution. A prominent member of the group that's credited with averting civil war in the country says the group acted "to give hope to young people." Zoubeir Souissi /Reuters /Landov hide caption

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How Tunisia's 'Quartet' Saved A Country From Civil War And Won The Nobel Peace Prize

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Tunisia's National Dialogue Quartet, represented here at a news conference in 2013, won the Nobel Peace Prize on Friday for the group's contribution to building democracy after the Jasmine Revolution in 2011. Anis Mili/Reuters /Landov hide caption

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3 Scientists Awarded Nobel Prize In Physiology Or Medicine

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In A Way, Gandhi Also Won 2014's Nobel Peace Prize

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Nobel Laureate Kailash Satyarthi has fought to end child labor in India, where 11 percent of the country's children work. In 2010, these children toiled at a construction site in New Delhi. Daniel Berehulak/Getty Images hide caption

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Malala Yousafzai poses for photographs in New York. Yousafzai, who survived being shot by the Taliban because she advocated education for girls, has been been named one of two recipients for the 2014 Nobel Peace Prize. Frank Franklin II/AP hide caption

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Nobel Peace Prize Winners Share Connection In Advocating For Children

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During her trip to Washington this week, Nobel Peace Prize nominee Malala Yousafzai met President Barack Obama, first lady Michelle Obama, and their daughter Malia Obama in the Oval Office. The White House/Getty Images hide caption

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Malala Yousafzai, 16, and her father, Ziauddin

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A United Nations vehicle carrying inspectors from the Organization for the Prohibition of Chemical Weapons (OPCW) leaves a hotel in Damascus, on Wednesday. Some 19 OPCW arms experts are in Syria and have started to destroy weapons production facilities. Louai Behara/AFP/Getty Images hide caption

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Malala Yousafzai, 16, speaks in New York last month. Yousafzai was shot a year ago by the Taliban for her outspoken advocacy in favor of girls' education in Pakistan. She is considered one of the favorites for the Nobel Peace Prize, which will be announced Friday. Ramin Talaie/Getty Images hide caption

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European Commission President Jose Manuel Barroso of Portugal during today's Nobel Peace Prize ceremony in Oslo. Nigel Waldron/Getty Images hide caption

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Left to right: Nobel Peace Prize laureates President Ellen Johnson Sirleaf of Liberia, Liberian "peace warrior" Leymah Gbowee and Tawakkul Karman of Yemen.

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NPR's Philip Reeves

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If the Nobel Peace Prize is to go to someone involved with the Arab Spring, it may be difficult to choose who gets the award. Here, men celebrate in Tunis after President Zine El Abidine Ben Ali said he would not seek another term.

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