Ukrainians put 8,000 cellphones connected to microphones on 6-foot poles around the country to detect incoming Russian drones. They detected 84/84 and shot down 80 of them with AA guns. Cost: $500ea

--- Gen James B Hecker, Commander US Air Forces, Europehttps://t.co/sisNvXdyxQ

— Chris Anderson (@chr1sa) March 25, 2024