The Bush administration wants to expand a medical screening program to former nuclear weapons workers at 12 additional sites nationwide. The program expansion includes the Mound plant in Miamisburg, Ohio, and the Fernald plant near Cincinnati. President Bush unveiled the plan this week as part of his proposed budget. About 25-thousand more workers would receive free, one-time tests under the plan that could help them seek early treatment for work-related illnesses. Union leaders at Fernald and the Mound site applauded the proposal. Senator George Voinovich of Ohio says the tests will help detect cancer and other diseases that otherwise could go untreated.