Pakistani human rights activists light lamps as they take part in a protest in Karachi on December 18, 2014, against the attack by Taliban militants on an army-run school in Peshawar. Pakistan is mourning 148 people -- mostly children -- killed by the Taliban in a school massacre that prompted global revulsion and put the government under new pressure to combat the scourge of militancy. AFP PHOTO / Asif HASSAN (Photo credit should read ASIF HASSAN/AFP/Getty Images)
