Ukraine was unable to break up Russian troops’ concentrations or conduct effective counter battery fire when the attack on Kharkiv began on May 10 because, unlike most other Russian offensives over the past two years, it was launched from across the border. The Ukrainians have also been given permission to use air defence missiles to shoot down enemy aircraft which pose a threat. Given the shortage of air defence missiles and the near impossibility of intercepting glide-bombs in flight, destroying aircraft on the ground may, however, be the only realistic way to challenge Russia’s increasing dominance of the skies. Will this lead to Nuclear War?