Robert Mueller breaks silence

US Special Counsel Robert Mueller, lead author of the controversial report which looked into claims of collusion between President Trump’s election campaign and the Russian government, made his first public speech since the publication of the report.

Also in the programme: The Yazidi families who survived the slavery of Islamic State; and the threat methane poses in the battle to reverse climate change.

(Picture: Special Counsel Robert Mueller speaks on the investigation into Russian interference in the 2016 Presidential election, at the US Justice Department in Washington, DC on 29th May 2019. Credit: Mandel Ngan/AFP/Getty Images)