Click on the ruling to see all of Kerlikowske's statements for that ruling.
Gil Kerlikowske's website
Scientific uncertainty complicates drug czar's claim
"More people are driving under the influence of drugs than are driving under the influence of alcohol. A recent roadside survey showed that 16 percent of the people tested, tested positive for illicit or licit drugs. That's significantly higher than alcohol."
Even with a rigorous study, it can be hard to tell.
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