The shooting at Sandy Hook Elementary School in December 2012 in Newtown, Connecticut resulted in the deaths of 20 students and six adults, who were shot and killed by Adam Lanza. Lanza entered the building by shooting through a glass window next to the locked front entrance.
In 2018, Dimitrios Pagourtzis killed 10 students and teachers and wounded 13 others at Santa Fe High School. According to one survivor’s account, the shooter went into two art classrooms and shot through windows on internal classroom doors and closets. In a documentary on the shooting The Kids of Santa Fe: The Largest Unknown Mass Shooting, it was revealed that a back door of one of the art rooms was able to open, and approximately 20 people exited to safety. The other classroom’s back door didn’t open, costing lives in the tragedy because they couldn’t escape.