LEADERS of the European Union have the euro crisis to discuss at their summit on June 28th-29th. Perhaps surprisingly, Montenegro will also be on the agenda (and not because it uses the euro despite not being in the euro zone, leading some to speculate that Greece may follow its example). Most countries favour opening membership talks with the six-year-old Balkan country of just over 600,000 people. But it may not happen. The Bulgarians say that to hold Montenegro back at this stage would be unfair, but Sweden is not alone in wanting more proof of a genuine fight against organised crime and corruption.