Col. Paul W. Tibbets, Jr., pilot of the Enola Gay, the plane that dropped the atomic bomb on Hiroshima, Japan, waves from his cockpit before takeoff from Tinian Island in Northern Marianas, Aug. 6, 1945. Anju Niwata and Hidenori Watanave of Tokyo University are adding color to pre-war and wartime photographs using a combination of methods. These include AI technologies, but also traditional methods to fill the gaps in automated coloring. These include going door to door interviewing survivors who track back childhood memories, and communicating on social media to gather information from a wider audience. (AP Photo/File)