Border control stopped me and I passed into unknown territory

THIS is a travel column. Well, it’s a column that contains a cautionary tale that involves travel and this season’s hottest political topic: A hard border.
A week ago, my husband and I arrived at Zagreb airport, on the outskirts of Croatia’s capital. We were to be met there and driven to Banja Luka, in Bosnia, where he was speaking at a conference. I decided to go along and see a country, Bosnia, I otherwise would not have visited.