Ukrainian President Volodymyr Zelenskyy is proposing a complete exchange of prisoners of war with Russia as the first step toward ending a three-year conflict. Foreign leaders of countries are gathered in Kyiv to pledge their support at a high-stakes summit. Mr Zelenskyy emphasised that Russia must release Ukrainians, offering to exchange all prisoners as a fair starting point for peace. Stuart Smith and Dasha Chernyshova report.
