The southern Ukrainian port city of Odesa was engulfed in flames late Thursday after being struck by a large-scale Russian drone attack, hours after US President Donald Trump expressed optimism about ending the war and as peace talks are set to resume on Monday.

Russia and Ukraine accused each other on Wednesday of violating a new agreement to refrain from attacks on energy targets, with scores of drone strikes launched hours after U.S. President Donald Trump spoke by phone to Russia's Vladimir Putin.

John Simpson, in discussion with the BBC's unparalleled range of experts across the world, analyses the negotiations between the United States and Russia over a ceasefire in Ukraine, examines Canada’s attempts to forge European alliances amidst a trade war with Donald Trump and – at a pivotal moment for the International Criminal Court - explores the impact of the arrest of Rodrigo Duterte,