U.S. President Donald Trump and Ukrainian leader Volodymyr Zelenskiy, in Rome for the funeral of Pope Francis, met one-on-one in a marble-lined Vatican basilica on Saturday to try to revive faltering efforts to end Russia's war with Ukraine.

President Zelensky emphasizes that Ukraine will not legally recognize the occupied territories as Russia's. As for the position on NATO, set out in response to Trump's peace plan, he noted that Moscow should not have the right to veto Ukraine's accession to the Alliance. Although there is no talk of joining in the foreseeable future.

Kyiv is working with allies on security guarantees akin to NATO's mutual protection pledge, Ukraine's president Volodymr Zelensky has said. Officials from Ukraine and allies the U.S., the U.K., France and Germany met in London on Thursday in a week when a peace proposal was produced which outlined an Article 5-like agreement which would be backed by Washington.