With twelve gold medals across the Olympic Games and World Championships, two decade long world records and a running style as familiar as his name, Michael Johnson has now turned his attention to the history of protest within sport. What should we expect of our athletes? What form of protest brings about most change? And as Mark Chapman asks - if he was competing today, would Michael himself be taking a stand against racial injustices? He discusses it all as his new podcast '“Defiance - A History of Protest in Sport' is released.