On 28 May, the European Commission published its proposal for a new EU Energy Security Strategy. The EU imports 53% of its energy consumption, more specifically 90% of its oil, 40% of its nuclear fuel, but in the light of the recent developments in Ukraine perhaps most importantly, 66% of its gas. Almost 40% of imported gas comes from the Russian export monopoly Gazprom, but the number reaches 100% in some Eastern EU members. In the following summer, the Commission will run a series of stress tests simulating energy supply disruptions. The tests should lead to better emergency mechanisms and will also identify some short-term steps to be taken to secure energy supply in the following winter should problems arise.