These days, buying concert tickets is a huge expense. If fans miss out, they can often find tickets on resale sites at hugely inflated prices. Sometimes people resell their tickets because they can’t go but there are also lots of “professional resellers” or ticket touts playing the system and making loads of profit. They buy tickets in bulk from the original seller platform, then mark them up to fans.

We hear from a Taylor Swift super fan, who has spent hundreds on resale tickets.

Now, a group of musicians including Dua Lipa, Coldplay, Sam Fender and Radiohead have sent a letter to the UK government, asking politicians to introduce a price cap on resale tickets to "stop touts from fleecing fans”. Ireland has already introduced a law to stop people selling tickets for more than their original price. Gary Devitt, who co-founded a platform in Ireland for fan-to-fan ticket resales called Toutless, gives us his view on what effect the law has had.

In this episode we hear some stories about buying resale tickets, and ask whether price caps can actually stop the touts. The BBC’s music correspondent Mark Savage also explains how ticket touts operate, and what artists could do themselves to reduce dodgy reselling.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Julia Ross-Roy, Imogen James and Maria Clara Montoya Editor: Verity Wilde

Prepping is a big deal in the US. There’s even a reality TV show called “Doomsday Preppers”. Prepping is when you stockpile loads of stuff - food, water, medicine - in case of a disaster, nuclear war or an unstoppable virus. Now billionaires are taking it to the next level, building underground mansions and self-sustaining bunkers that look like something out of a zombie apocalypse movie.

Meta CEO Mark Zuckerberg is building a $100 million compound in Hawaii—complete with plans for a huge underground bunker, although he’s described it as a “little shelter, like a basement”. Peter Thiel, the CEO of Paypal tried to build one in New Zealand and Bill Gates, the founder of Microsoft, is rumoured to have underground security areas under every one of his homes.

In this episode BBC reporter Nathalia Jimenez joins us again to chat about what exactly these billionaires are building and what they’re so worried about. And we hear from Lauren, a prepper in the US, about why she thinks it’s important to get organised.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Julia Ross-Roy and Benita Barden Video producer: Baldeep Chahal Editor: Verity Wilde

Are Christians being targeted and killed in their thousands in Nigeria? That’s the claim made by US President Donald Trump in several social media posts. He’s blamed the Nigerian Government for allowing the killing of Christians, and has threatened to stop aid and send troops into the African country. It not only caught the attention of Nigerians, but also rapper Nicki Minaj. In a post on X that’s been seen more than 50 million times, she said she’s grateful to Trump, writing that no group should be persecuted for their religion.

But is there truth to what Trump says? We speak to BBC reporter Ijeoma Ndukwe to learn more about the religious tensions in Nigeria and what’s really happening. We also hear from two young Nigerians, who offer up their thoughts on the situation.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 0330 12 33 22 6 Presenter: Hannah Gelbart Producers: Imogen James and Mora Morrison Editor: Verity Wilde