Pakistani civil society activists hold images of assassinated rights campaigner, Sabeen Mahmud during a protest in Karachi on April 30, 2015.  Pakistani Prime Minister Nawaz Sharif has ordered an investigation into the killing of prominent rights activist Sabeen Mahmud, who was shot dead minutes after she hosted a seminar on abuses in troubled Baluchistan province. AFP PHOTO / Rizwan TABASSUM        (Photo credit should read RIZWAN TABASSUM/AFP/Getty Images)