This was sent to me by my brother-in-law, Tony. It is a very interesting lesson in US history, which I have to say is not my strong point. In fact as a boy I struggled with history a lot.
This hot link leads you into a ten minute short history of the US, and at the end while it tries to suggest you buy an updated copy of the program ,you can enjoy your knowledge of the geography of the land by running the curser over all the states which are then displayed. Enjoy it.