Thomas Craemer, who is German, grew up feeling shameful about his country’s racist history. He spent a lot of time trying to understand why his grandparents’ generation allowed and in many cases participated in the Holocaust. It led him to an academic career that for the past 20 years has focused on racial attitudes and reparations for the descendants of those who were forced into slavery in the United States. Carol Hills talks to Thomas Craemer, who teaches public policy at the University of Connecticut.