The 2011 Nobel Peace Prize was awarded to a trio of women's rights activists: President Ellen Johnson Sirleaf and Leymah Gbowee of Liberia, and Tawakkul Karman of Yemen.
Nobel Peace Prize winner Liu Xiaobo, who is imprisoned in China, is unlikely to be released to attend this year's prize ceremony in Oslo.
Chinese dissident Liu Xiaobo and his family are not expected to be allowed to attend the Nobel Peace Prize ceremony. But China's opposition to the award has brought even more attention to it, some say.
After giving the Nobel Peace Prize to President Obama last year, the Norwegian Peace Prize Committee may opt for a more conventional winner this Friday.