In Jul 1993 I took a VC10K to the Hradec Kralove air show on static display. On the first day of the show, we noticed a VIP enclosure not far from our jet, in which there were a number of elderly gents in rather faded 'RAF' uniforms. They beckoned us over, so we went to chat with them to discover that these old chaps were members of the Czech Air Force who'd served in the Second World War.
Fascinating old chaps with some tales to tell. At one point a young fellow came over and asked us if we'd like a drink and, if so, please just ask. Not sure of the protocol, after he went away I asked the old boys who he was - "Boss of Czech Air Force", they replied - and indeed he was.
Really good to talk with these brave old chaps who very much still had their marbles - doubly so when enjoying the hospitality of the Czech Air Force!