A girl from a Soweto school displays a poster in reference to the school girls who were kidnapped from a school in Nigeria, by the Muslim extremist group Boko Haram, Wednesday, May 14, 2014, in Soweto, South Africa. The girls were kidnapped by the Muslim extremist group Boko Haram, igniting a viral social media campaign that has brought renewed attention to Boko Haram's campaign of violence, and protests around the world.Denis Farrell/The Associated Press