The First Great Train Robbery (1979)
We watched this movie last night with the kids. Based on a Michael Crichton book and directed by him, it's very loosely based on an actual robbery that occurred in 1855 in England. It's a pretty good heist movie, and we enjoyed it, although there's a lot of innuendo that I kept hoping the kids didn't get. Apparently, Sean Connery did his own stunt work on top of a moving train.