From Executive Producers Matthew Modine and Adam Rackoff. During tours of duty in Nevada, enlisted men and women were repeatedly exposed to lethal radiation at the world's largest nuclear test site. But because exercises were “top-secret,” the U.S. government continues to conceal official records of their ever having served there. Now cancer-stricken and ineligible for insurance because of their classified designation, veterans are mobilizing to prove they served and to secure basic healthcare benefits for themselves and their families.