It was a time when Americans were afraid to speak out. A swirling political and cultural hysteria was part of life. Anyone who questioned American policy was targeted and ruined. Books were taken from libraries. School teachers were being scrutinized. It was the Red Scare. In post-World War II America being called a communist was a serious charge. America was willing to abandon freedoms because of alleged conspiracies. Clay Risen joins us to discuss his new book "Red Scare: Blacklists, McCarthyism, and the Making of Modern America."