What The Last Nuremberg Prosecutor Wants The World To Know

(CBSNews) It is not often you get the chance to meet a man who holds a place in history like Ben Ferencz. Hes 99 years old barely five feet tall and he served as prosecutor of whats been called the biggest murder trial ever. The courtroom was Nuremberg; the crime genocide; and the defendants a group of German SS officers accused of committing the largest number of Nazi killings outside the concentration camps. More than a million men women and children shot in their own towns and villages in cold blood. As we first reported two years ago Ferencz is the last Nuremberg prosecutor alive today. But he isnt content just being a part of 20th century history -- he believes he has something important to offer the world right now. If its naive to want peace instead of war let em make sure they say Im naive. Because I want peace instead of war. Lesley Stahl: You know you-- have seen the ugliest side of humanity. Benjamin Ferencz: Yes. Lesley Stahl: Youve really seen evil. And look at you. Youre the sunniest man Ive ever met. The most optimistic. Benjamin Ferencz: You oughta get some more friends. Watching Ben Ferencz during his daily swim his gym workout and his morning push-up regimen is to realize he isnt just the sunniest man weve ever met -- he may also be the fittest. And thats just the beginning.