Commemorations of the first atomic bombings held across the United States and around the world provide a means to remind ourselves, our communities and elected officials that we continue to face the danger of nuclear annihilation, and that action for nuclear disarmament is an urgent necessity. Commemorations open spaces to educate the public—especially young generations—about the human consequences of nuclear war. They provide forums and encouragement to plan education and organizing in the year to come. In the United States, they also provide an opportunity to face and learn from one of the greatest war crimes in U.S. history.