Over March and April, Russian airpower launched a new wave of mass attacks on energy infrastructure in Ukraine. Energy generating facilities, in particular coal-fired and hydroelectric power plants, have come under the heaviest attacks. For the first time, Russia destroyed or damaged several of Ukraine’s biggest power stations, including the Trypilska power station just outside Kyiv. This new wave of Russian attacks, exploiting the growing shortage of key air defense systems and ammunition, is forcing Ukraine to once again call for help. The situation brings up memories of the winter and early…