Some of these kids may look sweet and innocent, but little did their parents know that in the ensuing years they would turn into monsters. From Bin Laden to Anders Behring Breivik, here are 20 Chilling Childhood Photos of The Most Evil People in History.

20: Adam Lanza

He may be smiling to the camera here but just a few years later, Lanza, who was  just 16,  carried out the deadliest school shooting in American history. After killing his own mother, he shot dead 20 young children and 6 teachers before he turned the gun on himself. It was later found that he was obsessed with school shootings and guns. Just what went wrong with him?