What was like in D-Day?

During World War II, the first day of the Allied invasion of Normandy (France) in June of 1944, typically called 'D-Day,' began with naval and air bombardments of the German defenses that were soon followed by amphibious landings of Allied troops upon the beaches. On some of these beaches, the Allied soldiers quickly landed and then moved ashore to secure inland objectives. On other beaches (most notably, Omaha Beach), Allied troops were pinned down and only slowly -- and at great loss -- moved inland. Sporadic fighting generally continued as night fell.