President Volodymyr Zelenskyy believes that one of the key mistakes of Ukraine after the collapse of the Soviet Union was the massive reduction of air defense systems. But the biggest problem is the lack of air defense systems,” Zelenskyy emphasized. The President noted that Ukraine received a powerful arsenal of air defense systems from the USSR. “We had 250 air defense systems. Therefore, one of the main needs of Ukraine today is air defense systems capable of protecting cities, critical infrastructure and military facilities.