In the spring of 1927, Andrew Kehoe, the treasurer for the school board in Bath, Michigan, spent weeks surreptitiously wiring the public school, as well as his farm, with hundreds of pounds of dynamite. The explosions on May 18, the day before graduation, killed and maimed dozens of children, as well as teachers, administrators, and village residents, including Kehoe's wife, Nellie. A respected member of the community, Kehoe himself died when he ignited...