How exciting! Bet you've had a most interesting life!
My only experience, not even coming close to your trip, was hubby & myself hosting an older Russian physicist when hubby was in grad school in the '70's. Prof. Krasilnikov(sp?) was in the US to attend a conference & hubby, because he spoke Russian, was asked to entertain him for 3 days. And so we did. He was a nice gentleman who corrected hubby's Russian when he misspoke. The professor's English was better than hubby's Russian apparently.
Strange that after our guest left, I got a visit from 2 "suits" (FBI or CIA?) one day; they'd come up with some laughable story just to be able to case our apartment & harass me, I think. Hubby was at work in the university lab or at Oak Ridge at the time. Our neighbor worked for the local newspaper and wrote a story about it. As this was in the cold-war era of the 70s, it was a local "big deal."
Below was all I could find, but not even coming close to the poster you mentioned.
I don't judge harshly because I know alcoholics are usually miserable people. 
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