Almost 100 Ukrainian enterprises have joined the state project of private air defense. Businesses are creating their own groups to defend against Russian drones, but companies are taking different approaches. New Post is already taking down Shahadi, Wild Wasps are deploying a network of mobile squads, and Darnizia has abandoned its air defense system due to the high cost of its constant updating. How much it costs to create and maintain a private air defense system, why not all companies are ready to invest in their own defense and how to join the state project - read in LIGA. net. Collage: Oleksandr Karamchanin / LIGA. net.