Hour 1: How did two Americans recover important art works by Donatello, Michelangelo, and others from Nazi looters? We’ll talk this hour with Robert Edsel, who takes us back to 1944 to retrace the steps of artist Deana Keller and scholar Fred Hartt in his book “Saving Italy: The Race to Rescue a Nation’s Treasures from the Nazis” (W. W. Norton & Company, 2013).