European leaders host summit to shore up support for Ukraine after Oval Office dust up

British Prime Minister Keir Starmer told leaders gathered Sunday for a summit on the war in Ukraine that they need to step up and continue to support Kyiv and meet a "once in a generation moment" for the security of Europe.

"Even while Russia talks about peace, they are continuing their relentless aggression," Starmer said at the opening of the meeting.

Starmer, flanked by Ukrainian President Volodymyr Zelenskyy and French President Emmanuel Macron, said the three of them have agreed to work on a plan to stop the fighting, and then take it to the United States, which has discussed brokering a peace deal.