Marijuana In The USA

A marijuana starter plant is for sale at a medical marijuana dispensary in Seattle, Washington. ANTHONY BOLANTE/REUTERS

Union member Taylor displays medical marijuana during a media visit at the Venice Beach Care Center medical marijuana dispensary in Los Angeles, California. JONATHAN ALCORN/REUTERS

Medical marijuana plants are pictured as they dry in the Los Angeles area. Mario Anzuoni/REUTERS

A sign advertises a medical marijuana dispensary on Venice Beach in Los Angeles. Lucy Nicholson/REUTERS

A woman sells fridge magnets outside a medical marijuana dispensary on Venice Beach in Los Angeles. Lucy Nicholson/REUTERS

Small marijuana plants, available for sale, are shown in a medical marijuana dispensary in Oakland. Robert Galbraith/REUTERS

A worker adjusts thermal rocks in a makeshift marijuana green space area at the weGrow superstore-sized garden center in Phoenix, Arizona June 2, 2011. A California-based company, weGrow, is seeking to capitalize on Arizona's newly enacted medical marijuana law. The 21,000-square-foot (6,400 meter) store offers some 2,000 products, including soil, grow lights and irrigation trays, specially designed for effective marijuana growing, founder Dhar Mann told Reuters. Joshua Lott/REUTERS

Bottles of nutrients for growing marijuana are displayed at the weGrow superstore-sized garden center in Phoenix, Arizona June 2, 2011. California-based company, weGrow, is seeking to capitalize on Arizona's newly enacted medical marijuana law. The 21,000-square-foot (6,400 meter) store offers some 2,000 products, including soil, grow lights and irrigation trays, specially designed for effective marijuana growing, founder Dhar Mann told Reuters. Joshua Lott/REUTERS

An attendee holds marijuana buds at the International Cannabis & Hemp Expo in Oakland. Mathew Sumner/REUTERS

A young cannabis strain is seen at Northwest Patient Resource Center in Seattle, Washington. Cliff DesPeaux/REUTERS

Medical marijuana is shown in a jar at The Joint Cooperative in Seattle. Cliff DesPeaux/REUTERS

A young cannabis plant grows at The Joint Cooperative in Seattle, Washington. Cliff DesPeaux/REUTERS

Guthrie, Refuerzo Martos stand amongst some of their medical marijuana products in their Seattle clinic. Anthony Bolante/REUTERS

Registered medical marijuana patient Grant Horstman (R) smokes from a bong with partner Jonathan Sullivan at their home in Burien, Washington, November 27, 2012. Washington State's Initiative 502, that was approved by voters in the November 6, 2012 general election, legalizes marijuana in Washington State effective December 6, 2012. Marijuana remains illegal at the Federal level. Picture taken November 27, 2012. Anthony Bolante/REUTERS

Dax Colwell of DamaOil holds a container of his company's concentrated medicinal cannabis oil extracted from marijuana at Canna Pi medical dispensary in Seattle, Washington, November 27, 2012. Medical cannabis in various forms is often prescribed for a variety of medical conditions including cancer, chronic pain, nausea, anorexia, migraines and glaucoma. Washington State's Initiative 502, that was approved by voters in the November 6, 2012 general election, legalizes marijuana in Washington State effective December 6, 2012. Marijuana remains illegal at the Federal level. Picture taken November 27, 2012. Anthony Bolante/REUTERS

A marijuana leaf is displayed at Canna Pi medical marijuana dispensary in Seattle. Anthony Bolante/REUTERS

A man lights up after the law legalizing the recreational use of marijuana went into effect in Seattle, Washington. Cliff DesPeaux/REUTERS

A customer rolls a joint made of half marijuana and half tobacco to smoke inside of Frankie Sports Bar and Grill in Olympia. Nick Adams/REUTERS

Marijuana is broken up for use by customers at Frankie Sports Bar and Grill in Olympia. Nick Adams/REUTERS

A customer at Frankie Sports Bar and Grill grinds up marijuana for use in Olympia. Nick Adams/REUTERS

A new billboard promotes legalizing marijuana in Denver. Rick Wilking/REUTERS

A variety of cannabis infused food products are displayed in the Simply Pure company kitchen in Denver. Rick Wilking/REUTERS

Cards supporting Amendment 64 are seen in campaign offices in Denver. Rick Wilking/REUTERS

People smoke marijuana joints at 4:20 p.m. as thousands of marijuana advocates gathered at Golden Gate Park in San Francisco. Robert Galbraith/REUTERS

A man prepares a marijuana joint during a gathering of thousands of marijuana advocates at Golden Gate Park in San Francisco. Robert Galbraith/REUTERS

A man advertises a medical marijuana dispensary on Venice Beach in Los Angeles. Lucy Nicholson/REUTERS