KIEV Ukraine's President Volodymyr Zelensky joins via a video call the opening of the Helsinki +50 Conference, marking the 50th anniversary of the Helsinki Final Act in Helsinki, Finland, on July 31, 2025. (Photo by Mikko Stig / Lehtikuva / AFP Ukrainian President Volodymyr Zelensky on Thursday urged his allies to bring about "regime change" in Russia , hours after a Russian drone and missile attack on Kiev killed 26 people including three children. The toll previously stood at 16, including