An “atomic veteran” was a military service member who:
Participated in an above-ground nuclear test between 1945 and 1962; or
Was part of the U.S. military occupation forces in or around Hiroshima/Nagasaki before 1946; or
Was held as a Prisoner of War in or near Hiroshima or Nagasaki (certain cases)
At the time of their service, they were told not to discuss their involvement in nuclear tests because the information was classified. But in 1996, the Repeal of Nuclear Radiation and Secrecy Agreements Laws was passed, allowing atomic veterans to finally seek overdue medical care.