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Challenges of determining if someone is too high to drive

Clip: 8/4/2018 | 11m 59sVideo has Closed Captions

Police face new challenges when determining if someone is too high to drive

As states across the country legalize marijuana, efforts to determine whether someone is too high to drive is becoming a thorny public health issue. From brain functioning analyses and phone apps to training police officers on looking for signs, Hari Sreenivasan reports from Massachusetts, the latest state to start opening marijuana dispensaries, on efforts to resolve the dilemma.

08/04/2018

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Major corporate funding for the PBS News Hour is provided by BDO, BNSF, Consumer Cellular, American Cruise Lines, and Raymond James. Funding for the PBS NewsHour Weekend is provided by...

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Trump administration to face off with CA over fuel standards

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