A visit to Hiroshima’s Peace Memorial Museum prompts a painful moral reckoning. Using Parshat Bo as his anchor, Rabbi Dunner examines whether decisive, devastating force is sometimes necessary to end evil. Drawing on Ramban, the Maharal, and Hiroshima itself, he challenges modern discomfort with the horrors of war—and the unsettling truth that ending evil can require unbearable, irreversible decisions, guided by moral clarity.