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Sports Minister George Hilton (top right) visits the Brazilian Doping Control Laboratory in Rio de Janeiro last month. The lab, which had been set to test samples from Olympic athletes in August, has been suspended by the World Anti-Doping Agency. Felipe Dana/AP hide caption

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Felipe Dana/AP

This second-generation prototype of a marijuana field tester being developed at Washington State University is larger than the planned final product. Tom Banse/KUOW hide caption

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Tom Banse/KUOW

High On The Highway: Scientists Try To Build A Marijuana Breath Test

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