Pakistani children arrive at their school in Peshawar on December 20, 2014, after three days of mourning for the children and staff killed by Taliban militants in an attack on an army-run school. A Taliban massacre at a school is "Pakistan's 9/11", the country's top foreign policy official told AFP, saying the assault that left 149 dead would change the country's approach to fighting terror. AFP PHOTO / A MAJEED (Photo credit should read A Majeed/AFP/Getty Images)
