Nobel Peace Prize winners in pictures
Winner of the Nobel Peace Prize Yemeni Tawakul Karman flashes a victory sign outside her tent in Tagheer square in Sanaa October 7, 2011. Karman said on Friday the award was a victory for Yemen's democracy activists and they would not give up until they had won full rights in a "democratic, modern Yemen".Ahmed Jadallah/REUTERS
Liberian president Ellen Johnson Sirleaf addresses the Millennium Development Goals summit on September 21, 2010 in New York City. Three women, Liberian President Ellen Johnson-Sirleaf, Liberian Leymah Gbowee and Yemeni Tawakkul Karman, jointly were announced winning the Nobel Peace PrizeChris Hondros/Getty Images
In this May 18, 2009 file photo, Caroline Kennedy, president of the Kennedy Library Foundation, left, stands with Liberian peace activist Leymah Gbowee after Gbowee was awarded the John F. Kennedy Profile in Courage Award at the John F. Kennedy Presidential Library and Museum, in Boston. Liberian President Ellen Johnson Sirleaf, Liberian activist Leymah Gbowee and Tawakkul Karman of Yemen have won the 2011 Nobel Peace Prize.Lisa Poole/POOL/AP
File photo of Liberia's President Ellen Johnson-Sirleaf at a plenary session on empowering girls and women during the Clinton Global Initiative in New York September 21, 2010. Johnson-Sirleaf and her compatriot Leymah Gbowee, who mobilised fellow women against their country's civil war, won the Nobel Peace Prize October 7, 2011, along with Yemeni women's rights and democracy activist Tawakkul Karman.Lucas Jackson/REUTERS
File photo of Tawakkul Karman (C) the chairwoman of Women Journalists without Chains, marches with her veiled colleagues during an anti-government protest in Sanaa February 10, 2011. Karman along with Liberia's President Ellen Johnson-Sirleaf and her compatriot Leymah Gbowee, who mobilised fellow women against their country's civil war, won the Nobel Peace Prize.Khaled Abdullah/REUTERS
In this Jan. 16, 2006 file photo, Liberia's new President Ellen Johnson Sirleaf, right, is helped with a sash by Liberian Senior Ambassador-at-large George W. Wallace, Jr., during her inauguration at the Capitol Building in Monrovia, Liberia. Liberian President Ellen Johnson Sirleaf, Liberian activist Leymah Gbowee and Tawakkul Karman of Yemen have won the 2011 Nobel Peace Prize.Charles Dharapak/AP
Picture taken on January 24, 2011 shows crowds gathering as activist Tawakel Karman is released on parole in the Yemeni capital Sanaa, after being detained over the weekend on charges of inciting disorder. Karman has been jointly awarded the Nobel Peace prize on October 7, 2011.Gamal Noman/AFP/Getty Images
U.S. President Barack Obama (R) meets with President Ellen Johnson Sirleaf (L) of Liberia in the Oval Office of the White House May 27, 2010 in Washington, DC. Three women, Liberian President Ellen Johnson-Sirleaf, Liberian Leymah Gbowee and Yemeni Tawakkul Karman, jointly were announced winning the Nobel Peace Prize.Alex Wong/Getty Images