Baarle-Hertog is a tiny, fragmented Belgian enclave in the Netherlands, sharing the same area with Dutch village Baarle-Nassau. Usually that just makes it a tourist oddity. These days, though, it means headaches for local residents and visitors alike as they have to juggle two very different sets of virus-prevention rules -- Belgian and Dutch -- often on different sides of the same street. In some cases, even inside the same shop....