Newtown Shootings

"The Bath School disaster is the name given to three bombings in Bath Township, Michigan, on May 18, 1927, which killed 38 elementary school children, two teachers, four other adults and the bomber himself; at least 58 people were injured. Most of the victims were children in the second to sixth grades (7–14 years of age) attending the Bath Consolidated School. Their deaths constitute the deadliest mass murder in a school in U.S. history." - http://en.wikipedia.org/wiki/Bath_School_disaster

God was "allowed" in schools at the time.