I remember my dad mentioning that his uncle almost got killed in Moscow on a layover when a Russian pulled a knife on him and demanded his socks... He decided that was enough for him and came back to the states..
The building of the Trans-Siberian railroad makes for some interesting reading. One of my sisters has his steamer trunk with the railroad markings on it as well as stickers from Nagasaki in Japan and an Astoria Hotel in TsienTsien, China. I think the railroad linked there in TsienTsien at that time. Even the US military was involved in the building of the railroad. Not much is really mentioned in the history books about it.