Poland is on high alert after a series of Russian drone attacks and hybrid warfare targeting its critical civilian infrastructure. The key NATO hub is now scrambling to protect one of its weakest points: its power grid. WSJ spoke with Polish citizens whose homes were damaged by Russian drones and embedded with Poland’s state energy grid PSE to see how officials are working to safeguard the nation’s vital energy network. Chapters: 0:00 Russian drones shot down in Poland 0:58 Poland’s