On May 18, 1927, the local school in Bath, Michigan, was bombed, killing 39 people. Of the victims, 38 were children.
Andrew Kehoe was responsible for the murders. He had recently lost his farm to foreclosure and blamed his financial troubles on the property taxes used to fund the school.
Kehoe, who was also the school caretaker, planted dynamite in the school's basement. Only half of it ignited, which allowed many students to escape.
On the morning of the bombing, Kehoe killed his wife and burned his farm to the ground. Shortly after the explosion at the school, Kehoe killed himself and 4 others when he detonated dynamite in his car.
In total, 45 people were killed, and 58 others were injured. The Bath School disaster remains the worst school massacre in US history.