The Winter Olympics has officially begun in Italy tonight - with, for the first time, two opening ceremonies, in Milan and in the Dolomites. One of the world's top skiers, Lindsey Vonn hopes to compete this weekend, despite badly injuring her knee ligament. We hear from another Winter Olympian why that bit of tissue is so important and speak to a British-born member of the world’s most famous bobsleigh team.

Also on the programme: A year after President Trump announced the suspension of US overseas aid, we hear about the effects on HIV treatment in South Africa

And we speak to the director of a BAFTA-nominated documentary, co-produced by Brad Pitt, looking at the influence of evangelical Christianity on far-right politics in Brazil.