Poland flexes its diplomatic muscles

As Nato’s secretary general, Jens Stoltenberg, and the UK prime minister, Rishi Sunak, visit Warsaw, we examine the role that Poland plays in the diplomatic field. Then: Donald Trump’s criminal trial; Taiwan wants to remove statues of Chinese dictator Chiang Kai-shek; and an exploration of the future of ticket resale with the managing director of Viagogo. Plus: aviation news and a lost Klimt painting is auctioned. See omnystudio.com/listener for privacy information.