Volodymyr Zelensky has posted a video of himself visiting an island that became a symbol of Ukrainian resistance - as the war enters its 500th day. At the start of the war, Ukrainian soldiers defending Snake Island famously defied an order from a Russian warship to surrender. The Black Sea island was seized by Russia but later reclaimed by Ukraine. In a video, the Ukrainian president called it a "place of victory" that would never be reconquered. In the undated clip, posted on Telegram, Mr Zelensky described it as proof that Ukraine will return every inch of its territory taken...