TOPSHOT - Tokyo Tower is seen between two office buildings in central Tokyo on April 8, 2026. (Photo by Andrew CABALLERO-REYNOLDS / AFP via Getty Images)

Members of the private air defense training group take part in simulator exercises in the training center's classroom at an undisclosed location, on April 8, 2026, amid the Russian invasion of Ukraine. Faced with hundreds of drones and missiles that Russia rains on Ukraine in daily attacks, Kyiv has invited private companies to acquire their own air-defence systems in a bid to ease the burden on its military. The plan -- involving state authorisations and integration into the air force coordination system -- has already attracted over a dozen companies. (Photo by Tetiana DZHAFAROVA / AFP via Getty Images)

Members of the private air defense training group take part in simulator exercises in the training center's classroom at an undisclosed location, on April 8, 2026, amid the Russian invasion of Ukraine. Faced with hundreds of drones and missiles that Russia rains on Ukraine in daily attacks, Kyiv has invited private companies to acquire their own air-defence systems in a bid to ease the burden on its military. The plan -- involving state authorisations and integration into the air force coordination system -- has already attracted over a dozen companies. (Photo by Tetiana DZHAFAROVA / AFP via Getty Images)

Members of the private air defense training group take part in simulator exercises in the training center's classroom at an undisclosed location, on April 8, 2026, amid the Russian invasion of Ukraine. Faced with hundreds of drones and missiles that Russia rains on Ukraine in daily attacks, Kyiv has invited private companies to acquire their own air-defence systems in a bid to ease the burden on its military. The plan -- involving state authorisations and integration into the air force coordination system -- has already attracted over a dozen companies. (Photo by Tetiana DZHAFAROVA / AFP via Getty Images)

Members of the private air defense training group take part in simulator exercises in the training center's classroom at an undisclosed location, on April 8, 2026, amid the Russian invasion of Ukraine. Faced with hundreds of drones and missiles that Russia rains on Ukraine in daily attacks, Kyiv has invited private companies to acquire their own air-defence systems in a bid to ease the burden on its military. The plan -- involving state authorisations and integration into the air force coordination system -- has already attracted over a dozen companies. (Photo by Tetiana DZHAFAROVA / AFP via Getty Images)

Members of the private air defense training group take part in simulator exercises in the training center's classroom at an undisclosed location, on April 8, 2026, amid the Russian invasion of Ukraine. Faced with hundreds of drones and missiles that Russia rains on Ukraine in daily attacks, Kyiv has invited private companies to acquire their own air-defence systems in a bid to ease the burden on its military. The plan -- involving state authorisations and integration into the air force coordination system -- has already attracted over a dozen companies. (Photo by Tetiana DZHAFAROVA / AFP via Getty Images)

A member of the private air defense training group takes part in simulator exercises in the training center's classroom at an undisclosed location, on April 8, 2026, amid the Russian invasion of Ukraine. Faced with hundreds of drones and missiles that Russia rains on Ukraine in daily attacks, Kyiv has invited private companies to acquire their own air-defence systems in a bid to ease the burden on its military. The plan -- involving state authorisations and integration into the air force coordination system -- has already attracted over a dozen companies. (Photo by Tetiana DZHAFAROVA / AFP via Getty Images)

A member of the private air defense training group takes part in a training session in a classroom at a training center at an undisclosed location, on April 8, 2026, amid the Russian invasion of Ukraine. Faced with hundreds of drones and missiles that Russia rains on Ukraine in daily attacks, Kyiv has invited private companies to acquire their own air-defence systems in a bid to ease the burden on its military. The plan -- involving state authorisations and integration into the air force coordination system -- has already attracted over a dozen companies. (Photo by Tetiana DZHAFAROVA / AFP via Getty Images)