This week, Polish-born Jan Karski, one of the first people to report an eyewitness account of the Nazi Holocaust to the West, died in Washington D.C. Host Jacki Lyden speaks with Karski biographer Tom Wood. Wood is the author of Karski: How One Man Tried to Stop the Holocaust. Jan Karski was a liason officer for the Polish underground during World War II and a retired history professor at Georgetown University in Washington D.C. He was 86.