There's not much to it. It was a few years back at one of the annual Space Congress events (http://www.spacecongress.org/ ). I was working for an aerospace museum and was tasked with picking up some of our VIPs at the airport and taking them to their hotel and then to our museum. Most of them had met at previous events, and treated each other like old friends. Two of them (IIRC, Dirk Frimout and Yury Usachev) got into an extended discussion about places they'd visited in my hometown. I don't quite know how to communicate how normal it all seemed -- as if they were family members talking about childhood, rather than members of opposite sides of what had been a bitter rivalry.

If you ever have a chance to talk to an astronaut or cosmonaut, don't pass it up. They are all incredibly brilliant people.