Philippe Sands: Is international justice working?

When the first Nuremberg trial of Nazi war criminals came to an end, the ground-breaking international tribunal handed down 12 death sentences. Seventy-five years on, is the world any better at delivering justice for the worst of crimes? In the years that followed, there were hopes that an evolving mechanism of international justice would deter and punish further heinous acts of mass murder and genocide. Does it remain an impossible ideal? Stephen Sackur speaks to international lawyer and author Philippe Sands.(Photo: Philippe Sands in the Hardtalk studio)