Amphibious warfare are still operating. On completion they were towed across the English Channel by tugs to the Normandy coast at only 4.3 Knots (8 km/h or 5 mph), built, operated and maintained by the Corps of Royal Engineers, under the guidance of Reginald D. Gwyther, who was appointed CBE for his efforts. By 9 June, just 3 days after D-Day, two harbours codenamed Mulberry "A" and "B" were constructed at Omaha Beach and Arromanches, respectively. However, a large storm on 19 June destroyed the American harbour at Omaha, leaving only the British harbour still intact but damaged, which included damage to
390th Strategic Missile Wing On 25 May 1944, a detachment of the group was directed to bomb coastal defenses in France using radar, despite weather conditions that were ideal for visual bombing. Although crewmembers were not advised why radar bombing was directed, this mission was a test to determine if pathfinder operations would succeed if the weather over Normandy was foul when the invasion took place. Thereafter, the group would frequently use pathfinder techniques when clouds obscured its assigned targets. The group bombed the coast near Caen fifteen minutes before the D-Day landings in Normandy on 6 June 1944. It attacked enemy artillery in