About the author: Margus Tsahkna is Estonia’s foreign minister. If Europe truly wants to be a real player in the geopolitical arena and to shape its own security and future, it must match strong words with decisive action. Europe has one powerful lever in its hands right now: Russia’s frozen assets. It’s time to use them. Around 210 billion euros ($246 billion) in Russian central bank assets are sitting frozen in Europe for one reason: Russia chose a full-scale war of aggression. And internati