From Our Own Correspondent

Kate Adie presents stories exploring events in Russia, the United States, Mexico, Lanzarote and South Africa.After its failed march on Moscow, the Wagner Group was supposedly going to be disbanded and its leader exiled to Belarus. But as our Eastern Europe correspondent Sarah Rainsford found out, this mercenary army still appears to be recruiting new members to its ranks.Across the United States, tens of millions of Americans still believe that Donald Trump won the 2020 presidential election - some of them are serving in public office. Mike Wendling is just back from Iowa, where he met one former conspiracy theorist whose own political appointment is causing friction among local Democrats and Republicans.The Tren Maya project is a huge looping railway line, nearly a thousand miles long, which (if completed) would connect the dots in Mexico's Yucatan peninsula - once the heartland of Mayan civilisation. As with any groundbreaking transport works, not everyone is happy - there have been objections over its pote