http://www.theatlantic.com/photo/2014/06/scenes-from-d-day-then-and-now/100752/
https://www.warhistoryonline.com/war-articles/ghosts-of-time-39-incredible-then-now-pictures-of-wwii.html
https://www.theguardian.com/artanddesign/ng-interactive/2014/jun/01/d-day-landings-scenes-in-1944-and-now-interactive
http://www.phillymag.com/property/2015/10/29/then-and-now-philadelphia-sliders/