The world wants Ukraine’s cutting-edge drones, but they aren’t yet for sale

Kyiv says it needs all its drones for the battlefield, but manufacturers insist the foreign revenue from exports would let them expand their production.KYIV — Foreign drone companies are swarming Ukraine, hoping to be a part of one of the most exciting unmanned vehicle production hubs in the world. There’s one problem: Ukraine’s drone makers are severely limited in exporting their production and know-how. Drone use and production have skyrocketed in the war between Ukraine and Russia, now in its fourth year, because of these machines’ low cost and deadly effectiveness. The constant battle-testing has accelerated the pace of evolution...