For the past half century, Beate and Serge Klarsfeld have hunted, confronted, prosecuted, and exposed Nazi war criminals all over the world, tracking down the notorious torturer Klaus Barbie in Bolivia and attempting to kidnap the former Gestapo chief Kurt Lischka on the streets of Cologne. They have been sent to prison for their beliefs and have risked their lives protesting anti-Semitism behind the Iron Curtain in South America and in the Middle East. They have been insulted and exalted, assaulted and heralded; they’ve received honors from presidents and letter bombs from neo-Nazis. They have fought relentlessly not only for the memory of all those who died in the Holocaust but also for modern-day victims of genocide and discrimination across the world. And they have done it all while raising their children and sustaining their marriage.