(Who am I kidding, inflatable space stations is often my first thought about many things.)

But seriously, was recently watching the "Man in Space" series that Disney did in the 50's with Werner von Braun — he where shows us his inflatable space station. So I've been kind of thinking more about that of late.

ie rapid deployment of light weight bridges in disaster areas, military engagements (such as fording rivers), and that kind of thing