The “Greatest Generation” returned from World War II with wounds that were often invisible, namely from PTSD, historian David Nasaw discusses in his new book, “The Wounded Generation.” Nasaw told Lesley Stahl that his father, who served in Eritrea, returned a different man than he had left, which wasn’t atypical for men of his generation. https://cbsn.ws/4hRwDfP | CBS Sunday Morning