(USA Today) - For nearly two decades at the Grand Canyon in Arizona, tourists, employees, and children on tours passed by three paint buckets stored in the national park's museum collection building, unaware that they were being exposed to radiation.
Although federal officials learned last year that the 5-gallon containers were brimming with uranium ore and then removed the radioactive specimens, the park's safety director alleges nothing was done to warn park workers or the public that they might have been exposed to unsafe levels of radiation. Read More
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