Ben Ferencz was just 27 when he secured the convictions of Nazi officers for war crimes and crimes against humanity. He was made chief prosecutor at the trial of members of the Einsatzgruppen, mobile SS death squads that operated within Nazi-occupied Eastern Europe and are estimated to have murdered more than a million people. In 2002, the International Criminal Court was set up in The Hague, Netherlands, although its effectiveness has been limited by the refusal of several major countries, including the US, to take part