In this episode, I spoke with author Garrett M. Graff about his book "When The Sea Came Alive: An Oral History of D-Day".  June 6, 1944—known to us all as D-Day—is one of history’s greatest and most unbelievable military triumphs. Though the full campaign lasted a little over two months, the surprise sunrise landing of more than 150,000 Allied troops on the beaches of occupied northern France is one of the most consequential days of the 20th century.