The United States dominates the world in airpower. Behind the birth of the US Air Force is a little-known story about the deadly firebombing campaign against Japan at the end of World War II. NHK combed through audiotaped interviews with 246 senior Air Force officials, including the leader of the air assault on Japan, Gen.Curtis LeMay. The interviews reveal how an "ideal" strategy designed to cause minimal civilian casualties ultimately went awry, and gave way to attacks with incendiary bombs that claimed some 400,000 Japanese lives.