However, during the war, the German army was requisitioning almost all of the 35-millimeter film stock in Europe, for use in reconnaissance missions; not only was the film expensive, but now it was nearly impossible to find. This presented a problem for my determined father, who searched diligently in film shops all over France. Whatever the cost, he was determined to pay it. Wherever he happened to be, he found time to look for his precious film, until one day, he realized that he did not need movie film at all. He saw that any 35-millimeter film would work equally well, so he purchased rolls and rolls of film intended for still photography. Then, he and my mother would stay up half the night, under the bedcovers, gluing the film together 36-frame strip by 36-frame strip, so that it would be suitable for moving pictures.