Why is the long-running dispute between Kosovo and Serbia escalating?

It's been 21 years since the end of the Kosovo war in Europe's Western Balkans. But tension between Kosovo and Serbia have reignited recently over car licence plates, with both sides deploying soldiers and special police to the border. So why is their long-running dispute escalating now? Join host Imran Khan.  With guests, Former Deputy Prime Minister of Serbia Zarko Korac, Senior Associate Bodo Weber, and EU Policy Analyst Pieter Cleppe.