On Dec. 16, 2014, seven gunmen broke into a school in a high-security zone in the northern Pakistani city of Peshawar, shooting indiscriminately into crowds of children, before splitting up and going room by room to execute dozens more.
Armed with explosives, suicide jackets, automatic rifles and pistols, these men cornered their targets in their classrooms, setting one teacher who attempted to resist on fire as a lesson to the rest.
Once in the school’s auditorium, they first shot and killed all those attempting to escape, and then went row by row to execute those who were left. Many were made to lie facedown in rows as the killers went down the line, shooting each in the head.