Terra Drone said its Terra A1, developed with Ukraine’s Amazing Drones, will cost about $2,500 per unit and is expected to undergo trials with Ukraine’s military in the coming months. The announcement comes as Iran’s drone attacks in the Middle East intensify scrutiny of the economics of air defense, with governments relying on costly interceptors to destroy far cheaper unmanned aircraft. Russia on April 8 said it had summoned Japan’s ambassador over Terra Drone’s investment in Ukrainian defense technology.