Historical memories are often weak, and must be kept alive by media, schools, and government. The disaster of 9/11 is one of those unusual and unsettling events that call for recognition. But memories are already fading in people's minds after just ten years. Unpleasant, contested events require commemoration but we tend to honor more upbeat history. Nevertheless, government and media, but especially teachers can implement a variety of creative strategies to keep 9/11 and other events a lively part of the theater of U.S. history.