ISTANBUL Ukrainian Defense Minister Denys Shmyhal on Thursday said Ukraine and neighboring Poland signed a memorandum on the creation of a joint working group on drones. Shmyhal said in a statement on Telegram that he signed the memorandum concerned together with his Polish counterpart Wladislaw Kosiniak-Kamysz in Kyiv, where he arrived on a visit earlier Thursday. The Ukrainian defense minister said Kyiv and Warsaw are taking their security cooperation to a “new level” in response to Russian