Between 1940 and 1943, Polish diplomats based in Bern, Switzerland, engaged in a remarkable – and until now, almost completely untold – humanitarian operation. This operation was one of the largest actions to aid Jews of the entire war and far eclipsed the better-known efforts of Oskar Schindler. In concert with two Jewish activists, these diplomats masterminded a systematic program of forging documents for Latin American countries that were smuggled into occupied Europe, in an attempt to save the lives of thousands of Jews facing extermination in the Holocaust.

Today’s guest is Roger Moorhouse, author of “The Forgers: The Forgotten Story of the Holocaust’s Most Audacious Rescue Operation.” We look at the heroism of a group of ordinary men whose actions were part of a wider story of the Polish Underground resistance.