Washington state Patrol Chief John Batiste, center, speaks to the media about public awareness and safety efforts the state is making in advance of the start of retail sales of recreational

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Washington state Patrol Chief John Batiste, center, speaks to the media about public awareness and safety efforts the state is making in advance of the start of retail sales of recreational marijuana, on Tuesday, June 24, 2014 in Olympia, Wash. Batiste says troopers are trained to recognize stoned drivers. (AP Photo/Rachel La Corte)

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Associated Press
Wed, Jun 25, 2014 12:47 PM EDT