Two days of talks between President Volodymyr Zelensky and allies have brought some progress on security guarantees, but Russia remains opposed to any foreign forces in Ukraine.

© Tyler Hicks/The New York Times

As it tried to demonstrate its continuing ability to fight, Ukraine said it had used drones to inflict serious damage on a Russian Kilo-class submarine at a Black Sea port.

© Ozan Kose/Agence France-Presse — Getty Images