ALBUQUERQUE, N.M. (AP) — Seven decades after an atomic bomb helped end World War II, descendants of families near a New Mexico test want tourists to know residents suffered for years afterward and some of their children may have been affected. Hundreds of visitors are expected Saturday to visit the Trinity Test site as federal officials open up the historic grounds for a rare opportunity for tourists to view the site of the world's first atomic blast. During the Manhattan Project, a World War II program that provided enriched uranium for the atomic bomb, scientists in the secret town of Los Alamos worked to develop the bomb that would later dropped on the Japanese cities of Hiroshima and Nagasaki. [...] that research didn't take into account internal exposure, in which radioactive materials are absorbed in the body. In 2012, the Atomic Heritage Foundation and the Los Alamos Historical Society released the "Voices of the Manhattan Project" website aimed at creating a central repository for the oral histories surrounding the tightly guarded World War II-era project.