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1 (of 7) Nobel Peace Prize Laureate Tawakkol Karman with her Nobel diploma at the Nobel Peace Prize Award Ceremony in Oslo, Norway, 10 December 2011.

Copyright © The Nobel Foundation 2011 Photo: Ken Opprann

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2 (of 7) From left: Host Helen Mirren, Nobel Peace Prize Laureates Ellen Johnson Sirleaf, Leymah Gbowee and Tawakkol Karman, and artist Angélique Kidjo at the Nobel Peace Prize Concert at the Oslo Spektrum Arena on 11 December 2011.

© The Nobel Foundation 2011. Photo: Ken Opprann

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3 (of 7) Nobel Peace Prize Laureates Ellen Johnson Sirleaf, Leymah Gbowee and Tawakkol Karman during their visit to the Nobel Museum in Stockholm, 12 December 2011.

Copyright © Scanpix 2011 Photo: Fredrik Sandberg/Scanpix

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4 (of 7) Eleven of the thirteen 2011 Nobel Laureates assembled for a group photo during their visit to the Nobel Foundation in Stockholm, 12 December 2011. Back row, left to right: Nobel Peace Prize Laureates Tawakkol Karman and Leymah Gbowee, Nobel Laureates in Physics Brian P. Schmidt, Saul Perlmutter and Adam G. Riess, Nobel Laureate in Chemistry Dan Shechtman and Nobel Laureate in Physiology or Medicine Bruce A. Beutler. Front row, left to right: Nobel Peace Prize Laureate Ellen Johnson Sirleaf, Laureate in Economic Sciences Christopher A. Sims, Nobel Laureate in Literature Tomas Tranströmer and Laureate in Economic Sciences Thomas J. Sargent.

© The Nobel Foundation 2011. Photo: Orasisfoto

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5 (of 7) Tawakkol Karman during an interview at the Nobel Museum in Stockholm on 7 March 2014. Copyright © Nobel Media AB 2014

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6 (of 7) Portrait of Tawakkol Karman during an interview at the Nobel Museum in Stockholm on 7 March 2014. Copyright © Nobel Media AB 2014

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7 (of 7) Tawakkol Karman, in Sanaa, Yemen, in a tent during a sit-in on 5 October, 2011.

Photo: Ahmed Jadallah/Scanpix