Russia launched a barrage of drones and missiles at Ukraine overnight, killing at least six people, including two children, and leaving tens of thousands without power, officials reported Sunday. Ukrainian President Volodymyr Zelensky condemned the attacks, which also injured a dozen others, saying they demonstrated Moscow’s intent to “inflict harm” on civilians. Despite U.S. calls to end its nearly four-year invasion, Russia has continued both its ground offensive and renewed strikes on Ukraine’s energy infrastructure. Former Advisor to Ukraine’s Defence Ministry, Yuriy Sak, gives his insights.