At first glance this image looks just like every other school photo from the 1990s, but if you look a little closer you’ll see that it’s a chilling prediction of what was to come.
This is the class of 99′ from Columbine High School and in the far left corner Eric Harris, Dylan Klebold and their friends are pointing pretend guns at the camera.
Only a few weeks later on April 20, 1999, Harris and Klebolf would shoot dead 12 students and one teacher, in a highly organised attack on their fellow classmates. They would also injure an additional 21 people.
The pair, who the media dubbed the 'trench coat mafia', would die by suicide as police closed in on them.
Although Harris and Klebold's precise motives remain unclear, their personal journals revealed that they wanted their actions to rival the Oklahoma City Bombing and other deadly incidents in the United States in the 1990s.
Columbine is often referred to as the deadliest high school massacre in US history and it sparked debates over gun control laws, high school cliques, subcultures and bullying.
Ken Kratz talks about Brendan Dassey walking free and about the case on the Nitty Gritty Committee.
It resulted in increased school security with zero tolerance policies across America.
However, almost 20 years on from Columbine, there has been little to no changes to US gun laws.