Ben Ferencz - Prosecutor at the Nuremberg Nazi Trials

The death has been announced of the last surviving prosecutor of the Nuremberg trials of senior Nazis, Ben Ferencz. Zeinab Badawi spoke to him in 2017 at his home in Florida. As a young soldier serving in the US Army, he helped liberate the death camps of Europe. He said the Nuremberg trials were tough and that witnessing first-hand the result of Nazi cruelty was gruelling. Did he believe those trials have made genocide and crimes against humanity less likely to be committed in the world today?