This June 6, 1944, file photo shows American soldiers of the Allied Expeditionary Force securing a beachhead during initial landing operations at Normandy, France, June 6, 1944. From the first sketchy German radio broadcast to the distribution of images filmed in color, it has taken decades for the full story of the D-Day invasion to come out. As world leaders and veterans prepare to mark the 70th anniversary of the invasion this week, multiple Twitter hashtags are following the ceremonies minute by minute. At the time, the reporting, filming and taking of photos was neither easy nor straightforward. (AP Photo/Weston Haynes, File)