Chronicles the events that forced the United States, to drop the atomic bomb on Japan during World War II. Discusses the work of the Manhattan Project to develop and test an atomic bomb, as well as the decision to use it during World War II. The United States has been shaped by the people and events of its past. This series vividly describes events that had an effect on U.S. history and introduces young readers to the people who shaped them. The easy-to-read text, historic art and photography, suggested activities and clear, simple maps help bring to life the causes of these events, their effects on people at the time, and their significance today.