Exercise Tiger was a large-scale dress rehearsal conducted in April 1944 to prepare for the Normandy landings. It turned into a catastrophic fiasco that cost the lives of 750 American soldiers and sailors. Host-historians Chris Anderson and Rick Beyer explore the tragic story with naval historian Craig Symonds, author of "Operation Neptune: The D-Day Landings and the Allied Invasion of Europe. "What went wrong and how did it impact the D-Day landings? Plus: Shedding light on the often overlooked naval effort required to mount the Normandy landings. Sunday at 4 PM ET on History Happy Hour, the spot where history is always on tap.