Clara Amfo and Jack Saunders guide you through everything that's happening on Saturday evening at Glastonbury Festival, where it's the turn of a couple of US artists to take to the stage.Californian sisters Haim return to the Pyramid Stage, nine years after they made their debut, and Texan soul singer Leon Bridges, who released his third album Gold-Diggers Sound last year, performs on the West Holts stage.Also, expect music from Australian electronic group The Avalanches, who play the Park Stage, while presenter James Ballardie gets out and about in amongst the festival action.