BATH — Josephine Cushman Vail will lay red tulips on the grave of her little brother today, as she has nearly every year since 1927. Ralph Cushman, then 7, died 80 years ago today, along with 44 other people in what stood for more than 60 years as the largest mass murder in the United States. Vail, 93, said she could just as easily have died with her brother when a disgruntled school board member dynamited the Bath Consolidated School in the quiet, close-knit community 13 miles northeast of Lansing. Vail, then 13, was excused from taking final exams that...