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A Seattle resident takes marijuana from a plastic bag shortly after a law legalizing the recreational use of marijuana took effect on December 6, 2012 in Seattle, Washington. Voters approved an initiative to decriminalize the recreational use of marijuana making it one of the first states to do so. (Photo by Stephen Brashear/Getty Images)

C. Nash smokes marijuana, Thursday, Dec. 6, 2012, just after midnight at the Space Needle in Seattle. Possession of marijuana became legal in Washington state at midnight, and several hundred people gathered at the Space Needle to smoke and celebrate the occasion, even though the new law does prohibit public use of marijuana. (AP Photo/Ted S. Warren)

Russ Belville, an Internet radio host from Portland, Oregon, counts down to midnight shortly before a law legalizing the recreational use of marijuana took effect on December 5, 2012 in Seattle, Washington. Voters approved an initiative to decriminalize the recreational use of marijuana making it one of the first states to do so. (Photo by Stephen Brashear/Getty Images)

A Tacoma resident rolls a joint shortly after a law legalizing the recreational use of marijuana took effect on December 6, 2012 in Seattle, Washington. Voters approved an initiative to decriminalize the recreational use of marijuana making it one of the first states to do so. (Photo by Stephen Brashear/Getty Images)

A Tacoma resident smokes marijuana shortly after a law legalizing the recreational use of marijuana took effect on December 6, 2012 in Seattle, Washington. Voters approved an initiative to decriminalize the recreational use of marijuana making it one of the first states to do so. (Photo by Stephen Brashear/Getty Images)

Jared Cruver of Snohomish, Washington smokes marijuana from a mini water pipe shortly after a law legalizing the recreational use of marijuana took effect on December 6, 2012 in Seattle, Washington. Voters approved an initiative to decriminalize the recreational use of marijuana making it one of the first states to do so. (Photo by Stephen Brashear/Getty Images)

Paul of Tacoma, who declined to give his last name smokes marijuana from a water pipe underneath the Space Needle shortly after a law legalizing the recreational use of marijuana took effect on December 6, 2012 in Seattle, Washington. Voters approved an initiative to decriminalize the recreational use of marijuana making it one of the first states to do so. (Photo by Stephen Brashear/Getty Images)

A man known as "Professor Gizmo," smokes marijuana in a glass pipe, Wednesday, Dec. 5, 2012, just before midnight at the Space Needle in Seattle. Possession of marijuana became legal in Washington state at midnight, and several hundred people gathered at the Space Needle to smoke and celebrate the occasion, even though the new law does prohibit public use of marijuana. (AP Photo/Ted S. Warren)

Robyn Bowen of Seattle Washington smokes marijuana underneath the Space Needle shortly after a law legalizing the recreational use of marijuana took effect on December 6, 2012 in Seattle, Washington. Voters approved an initiative to decriminalize the recreational use of marijuana making it one of the first states to do so. (Photo by Stephen Brashear/Getty Images)

A resident of Seattle smokes marijuana as he is photographed shortly before a law legalizing the recreational use of marijuana took effect on December 5, 2012 in Seattle, Washington. Voters approved an initiative to decriminalize the recreational use of marijuana making it one of the first states to do so. (Photo by Stephen Brashear/Getty Images)

Dustin, left, and Paul of Tacoma, Washington, both of which declined to give their last names, share a water pip underneath the Space Needle shortly after a law legalizing the recreational use of marijuana took effect on December 6, 2012 in Seattle, Washington. Voters approved an initiative to decriminalize the recreational use of marijuana making it one of the first states to do so. (Photo by Stephen Brashear/Getty Images)

A resident of Tacoma, Washington smokes marijuana shortly before a law legalizing the recreational use of marijuana took effect on December 5, 2012 in Seattle, Washington. Voters approved an initiative to decriminalize the recreational use of marijuana making it one of the first states to do so. (Photo by Stephen Brashear/Getty Images)

C. Nash smokes marijuana in a glass pipe, Thursday, Dec. 6, 2012, just after midnight at the Space Needle in Seattle. Possession of marijuana became legal in Washington state at midnight, and several hundred people gathered at the Space Needle to smoke and celebrate the occasion, even though the new law does prohibit public use of marijuana. (AP Photo/Ted S. Warren)

A man lights up after the law legalizing the recreational use of marijuana went into effect in Seattle, Washington December 6, 2012. With Washington state the first in the nation legalizing marijuana possession for adult recreational use, Seattle's city attorney issued a stern warning on Wednesday to those waiting to celebrate - no pot puffing in public. REUTERS/Cliff Despeaux

People light up under the lights of the Space Needle after the law legalizing the recreational use of marijuana went into effect in Seattle, Washington December 6, 2012. With Washington state the first in the nation legalizing marijuana possession for adult recreational use, Seattle's city attorney issued a stern warning on Wednesday to those waiting to celebrate - no pot puffing in public. REUTERS/Cliff Despeaux

A woman, identified only as "Hurricane," lights up after the law legalizing the recreational use of marijuana went into effect in Seattle, Washington December 6, 2012. With Washington state the first in the nation legalizing marijuana possession for adult recreational use, Seattle's city attorney issued a stern warning on Wednesday to those waiting to celebrate - no pot puffing in public. REUTERS/Cliff Despeaux

People light up near the Space Needle after the law legalizing the recreational use of marijuana went into effect in Seattle, Washington December 6, 2012. With Washington state the first in the nation legalizing marijuana possession for adult recreational use, Seattle's city attorney issued a stern warning on Wednesday to those waiting to celebrate - no pot puffing in public. REUTERS/Cliff Despeaux

Marijuana is seen in the hand of a person after the law legalizing the recreational use of marijuana went into effect in Seattle, Washington December 6, 2012. With Washington state the first in the nation legalizing marijuana possession for adult recreational use, Seattle's city attorney issued a stern warning on Wednesday to those waiting to celebrate - no pot puffing in public. REUTERS/Cliff Despeaux

From left, Andre Edwards, G.E. Montoya, and J. Smiley pass around a glass pipe as they smoke marijuana, Thursday, Dec. 6, 2012, just after midnight at the Space Needle in Seattle. Possession of marijuana became legal in Washington state at midnight, and several hundred people gathered at the Space Needle to smoke and celebrate the occasion, even though the new law does prohibit public use of marijuana. (AP Photo/Ted S. Warren)

Mike Momany smokes marijuana, Thursday, Dec. 6, 2012, just after midnight at the Space Needle in Seattle. Possession of marijuana became legal in Washington state at midnight, and several hundred people gathered at the Space Needle to smoke and celebrate the occasion, even though the new law does prohibit public use of marijuana. (AP Photo/Ted S. Warren)

Allister Adams smokes marijuana, Thursday, Dec. 6, 2012, just after midnight at the Space Needle in Seattle. Possession of marijuana became legal in Washington state at midnight, and several hundred people gathered at the Space Needle to smoke and celebrate the occasion, even though the new law does prohibit public use of marijuana. (AP Photo/Ted S. Warren)

Andre Edwards smokes marijuana, Thursday, Dec. 6, 2012, just after midnight at the Space Needle in Seattle. Possession of marijuana became legal in Washington state at midnight, and several hundred people gathered at the Space Needle to smoke and celebrate the occasion, even though the new law does prohibit public use of marijuana. (AP Photo/Ted S. Warren)

Allister Adams smokes marijuana, Thursday, Dec. 6, 2012, just after midnight at the Space Needle in Seattle. Possession of marijuana became legal in Washington state at midnight, and several hundred people gathered at the Space Needle to smoke and celebrate the occasion, even though the new law does prohibit public use of marijuana. (AP Photo/Ted S. Warren)

Gary Parrish smokes marijuana in a glass pipe, Thursday, Dec. 6, 2012, just after midnight at the Space Needle in Seattle. Possession of marijuana became legal in Washington state at midnight, and several hundred people gathered at the Space Needle to smoke and celebrate the occasion, even though the new law does prohibit public use of marijuana. (AP Photo/Ted S. Warren)

A person holds a freshly rolled marijuana joint, Thursday, Dec. 6, 2012, just after midnight at the Space Needle in Seattle. Possession of marijuana became legal in Washington state at midnight, and several hundred people gathered at the Space Needle to smoke and celebrate the occasion, even though the new law does prohibit public use of marijuana. (AP Photo/Ted S. Warren)