The Alex Salmond Show examines the legacy of the late Northern Ireland peacemaker John Hume. Alex speaks with journalist and author Dr David Blake Knox, whose new book ‘The Killing of Thomas Niedermayer’, explores an atrocious murder at the height of the Troubles, and with one of Hume’s successors as leader of the Social Democratic and Labour Party, Alasdair McDonnell, who explores the path to peace.