People light candles beside the pictures of their family members who were killed in an attack on a Peshawar school in 2014, during a ceremony marking the second anniversary of the attack, in Peshawar, northwestern Pakistan, on Dec. 15, 2016. On Dec. 16, 2014, a group of armed militants disguised as military men attacked a military-run school in Peshawar, killing at least 141 people --132 children and nine staff members, while injuring 133 others. (Xinhua/Ahmad Sidique)