The children who survived the 2012 shooting at Sandy Hook Elementary School in Newtown, Connecticut, will be graduating high school with mixed emotions. (AP Video by Noreen Nasir)

Sandy Hook shooting survivors are graduating with mixed emotions and without 20 of their classmates

The children who survived the 2012 shooting at Sandy Hook Elementary School in Newtown, Connecticut, will be graduating high school with mixed emotions. (AP Video by Noreen Nasir)