ZAGREB, Croatia -- Twenty minutes out of Croatia's capital, nestled upon a hill called Sestine, sits a cafe called Non Plus Ultra, or "No Higher Point."
It's a busy establishment. The smell of coffee fills the air as businessmen, politicians and mother's groups sit rugged up, chatting inside, underneath the heaters or braving it in the frosty conditions.
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Behind the counter, a barista has a familiar look. Former Premier League star and Australian captain...