Two families of children killed in the Sandy Hook Elementary School shooting two years ago have sued the town of Newtown over allegedy lax security at the school, the Hartford Courant's Dave Altimari reports. The lawsuit alleges that a substitute teacher "had neither a key to lock the door nor any knowledge of the … safety and security protocols rehearsed at the Sandy Hook Elementary School in case an intruder or other dangerous individual gained access to the school." In that classroom, shooter Adam Lanza killed all but one girl.