Indian youth hold placards and candles as they pay tribute to the children and staff killed in a Taliban militant attack on a school in Peshawar the previous day, in New Delhi on December 17, 2014. Pakistan began three days of mourning on December 17, for the 132 schoolchildren and nine staff killed by the Taliban in the country's deadliest ever terror attack as the world united in a chorus of revulsion. AFP PHOTO / SAJJAD HUSSAIN (Photo credit should read SAJJAD HUSSAIN/AFP/Getty Images)
