Pakistani civil society activists and children hold light candles during a vigil in Lahore on December 18, 2014, for the children and teachers killed in an attack by militants on an army-run school in Peshawar. Students grieving for their classmates massacred by the Pakistani Taliban have vowed to defy the militants and return to school as soon as possible. AFP PHOTO / Arif ALI        (Photo credit should read Arif Ali/AFP/Getty Images)
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