A couple of weeks ago, a reader here challenged my biases on pot and driving. Here's the story that came from that: http://t.co/GIFaQfzcZO — Maggie Koerth-Baker (@maggiekb1) February 17, 2014 “In a 2012 study published in the journal Psychopharmacology, only 30 percent of people under the influence of THC, the active ingredient in marijuana, failed Read more