FILE - In this Saturday, Jan. 22, 2011 file photo, Yemeni activist Tawakkul Karman chants slogans calling on President Ali Abdullah Saleh to leave the government and follow Tunisian ousted President Zine El Abidine Ben Ali into exile during a protest in Sanaa, Yemen. The 2011 Nobel Peace Prize was awarded Friday, Oct. 7, 2011 to Liberian President Ellen Johnson Sirleaf, Liberian peace activist Leymah Gbowee and Tawakkul Karman of Yemen for their work on women's rights. (AP Photo/Hani Mohammed, File)