On December 14, 2012, a gunman opened fired inside Sandy Hook Elementary School in Newtown, Connecticut. The shooting killed 20 first-grade students and six educators.
The video shows how easy it is to miss the signs of someone planning a shooting and encourages us all to pay more attention.
The ''new'' Sandy Hook Elementary School opened this week, and at least one victim's family has decided to not even see it.
The public will get its first glimpse of the Newtown, Conn., school built to replace the one where 20 first-graders and six educators were massacred.
