On the outside, Enola Gay is a perfectly normal Boeing B-29 Superfortress Strategic Bomber. The most controversial single plane in the history of aviation, bar none. Not that it needs any introduction, say hello to Enola Gay. An aircraft that genuinely changed the course of history.

Because on display at this official annex of the Smithsonian Air and Space Museum is a plane that caused more profound amazement and abject horror all at the same time than any other in history.