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DeepSeek's Chinese chatbot sent shockwaves around the tech and financial world when it was released in January. Offering a similar service to Western rivals, the R1 model shocked by doing so at a fraction of the cost. Mark Lobel takes a deep dive into DeepSeek with a China AI investor and a security expert.

Later in the show, business trips are back on the agenda. People travelling for work is on the rise - and expected to grow. Paul Abbott, CEO of American Express Global Business Travel, tells us what's behind the increase and how Amex GBT is doing travel more sustainably.