CNN — June 6, 2024 marks 80 years since D-Day, the first day of the Normandy landings that laid the foundations for the Allied defeat of Nazi Germany in World War II. The invasion – codenamed Operation Overlord – saw of tens of thousands of troops from countries including the United States, the United Kingdom and Canada landing on five stretches of the coastline of Normandy, France – codenamed Utah, Omaha, Gold, Juno and Sword beaches. Planning for D-Day began more than a year in advance, and the Allies carried out substantial military deception to confuse the Germans as to...