I have returned again and again to see the images and read the stories of the brave and fabulous American engineers responsible for the constructing the Spellen pontoon bridge over the Rhine: the first complete and in a timespan that makes it the nineteenth-century wonders of the world. Having crossed into Normandy a few months after D-Day, my aunt, a Great Ormond Street stained children's nurse, crossed on that bridge after work in Normandy, Belgium and Holland to be one of the Red Cross Nurses who liberated Belsen. A member of her group, driving a 15 CWT, was one of the people who slid off the main track and held up traffic that spring on their way to the "Horror Camp."