The Global Marijuana March

A woman smokes a large joint before The Global Marijuana March in Toronto, May 7, 2011. Demonstrators took part in a march to support the legalization of marijuana. REUTERS/Mark Blinch

A demonstrator dressed as a marijuana leaf jokes during the Global Marijuana March rally in Lisbon May 7, 2011. REUTERS/Rafael Marchante

A demonstrator poses with glasses adorned with marijuana leafs during the Global Marijuana March rally in Lisbon May 7, 2011. REUTERS/Rafael Marchante

Banners are seen on the floor before the start during the Global Marijuana March rally in Lisbon May 7, 2011. REUTERS/Rafael Marchante

A demonstrator walks showing his tattoo of a marijuana leaf during the Global Marijuana March rally in Lisbon May 7, 2011. REUTERS/Rafael Marchante

A demonstrator with glasses adorned with marijuana leafs smiles during the Global Marijuana March rally in Lisbon May 7, 2011. REUTERS/Rafael Marchante

Demonstrators hold a banner reading Against crisis, legalize during the Global Marijuana March rally in Lisbon May 7, 2011. REUTERS/Rafael Marchante

A man smokes a large joint before The Global Marijuana March in Toronto, May 7, 2011. Demonstrators took part in a march to support the legalization of marijuana. REUTERS/Mark Blinch

A man smokes a marijuana joint inside a box with a happy face cut out before The Global Marijuana March in Toronto, May 7, 2011. REUTERS/Mark Blinch

A woman smokes marijuana from a bong before The Global Marijuana March in Toronto, May 7, 2011. Demonstrators took part in a march to support the legalization of marijuana. REUTERS/Mark Blinch

A youth uses an gas mask apparatus to smoke marijuana before The Global Marijuana March in Toronto, May 7, 2011. Demonstrators took part in a march to support the legalization of marijuana. REUTERS/Mark Blinch

A young woman smokes marijuana before The Global Marijuana March in Toronto, May 7, 2011. Demonstrators took part in a march to support the legalization of marijuana. REUTERS/Mark Blinch

A demonstrator wearing a marijuana leaf hat shouts during the Global Marijuana March rally in Lima, May 7, 2011. REUTERS/Enrique Castro-Mendivil

A demonstrator holds a marijuana leaf before the Global Marijuana March rally in Lima, May 7, 2011. REUTERS/Enrique Castro-Mendivil

A demonstrator holds a flag during the Global Marijuana March rally in Lima, May 7, 2011. REUTERS/Enrique Castro-Mendivil

A demonstrator shouts slogans during the Global Marijuana March rally in Lima, May 7, 2011. REUTERS/Enrique Castro-Mendivil

A man smokes a large joint before The Global Marijuana March in Toronto, May 7, 2011. Demonstrators took part in a march to support the legalization of marijuana. REUTERS/Mark Blinch

A demonstrator shouts slogans during the Global Marijuana March rally in Lima, May 7, 2011. REUTERS/Enrique Castro-Mendivil

A demonstrator wearing a marijuana leaf hat shouts during the Global Marijuana March rally in Lima, May 7, 2011. REUTERS/Enrique Castro-Mendivil

A man takes pictures during the Global Marijuana March rally in Lisbon May 7, 2011. REUTERS/Rafael Marchante

A demonstrator attends the Global Marijuana March in Rio de Janeiro May 7, 2011. Demonstrators took part in a march to support the legalization of marijuana. REUTERS/Ricardo Moraes (BRAZIL - Tags: SOCIETY)

A man holds up a flag resembling the Canadian flag with a marijuana leaf in the middle at The Global Marijuana March in support of legalizing marijuana in Toronto May 7, 2011. REUTERS/Mark Blinch

Marijuana activist Matt Mernagh carries his marijuana plant before The Global Marijuana March in Toronto May 7, 2011. Demonstrators took part in a march to support the legalization of marijuana.REUTERS/Mark Blinch

A protester wears a wrestler's mask with a marijuana leaf on it during a march for the legalization of marijuana outside the Mexican Revolution monument in Mexico City May 7, 2011. About 600 people attended the Global Marijuana March to support marijuana legalisation, according to local media. Picture taken May 7, 2011. REUTERS/Carlos Jasso

A girl helps a man light marijuana in a gas mask apparatus before The Global Marijuana March in Toronto, May 7, 2011. Demonstrators took part in a march to support the legalization of marijuana. REUTERS/Mark Blinch

People smoke marijuana during the Global Marijuana March in Toronto May 7, 2011. Demonstrators took part in a march to support the legalization of marijuana. REUTERS/Mark Blinch

People take part in the Global Marijuana March in Rio de Janeiro May 7, 2011. Demonstrators took part in a march to support the legalization of marijuana. REUTERS/Ricardo Moraes )

A marijuana plant is seen at the The Global Marijuana March in Toronto, May 7, 2011. Demonstrators took part in a march to support the legalization of marijuana. REUTERS/Mark Blinch

A marijuana plant is seen at the The Global Marijuana March in Toronto, May 7, 2011. Demonstrators took part in a march to support the legalization of marijuana. REUTERS/Mark Blinch

A demonstrator wears a mask of Osama Bin Laden during the Global Marijuana March in Rio de Janeiro May 07, 2011. Demonstrators took part in a march to support the legalization of marijuana. REUTERS/Ricardo Moraes

People carry a replica of a giant marijuana cigar during the Global Marijuana March in Rio de Janeiro May 7, 2011. Demonstrators took part in a march to support the legalization of marijuana. REUTERS/Ricardo Moraes

A woman stands with a marijuana leaf painted on her face during a march for the legalization of marijuana outside of the Mexican Revolution monument in Mexico City May 7, 2011. About 600 people attended the Global marijuana march to demand marijuana legalisation so can be used for recreational purposes.according to local media REUTERS/Carlos Jasso

A woman smokes a joint during a march for the legalization of marijuana outside the Mexican Revolution monument in Mexico City May 7, 2011. About 600 people attended the Global marijuana march to support marijuana legalisation, according to local media. REUTERS/Carlos Jasso

A man smokes marijuana inside an apple during a march for the legalization of marijuana outside the Mexican Revolution monument in Mexico City May 7, 2011. About 600 people attended the Global marijuana march to demand marijuana legalisation, according to local media. REUTERS/Carlos Jasso

A protester smokes marijuana during a demonstration against penalties for the consumption of small amounts of drugs, in Medellin May 7, 2011. The government is proposing a sanction for the use of more than 20 grams (0.7 ounces) of marijuana and one gram (0.035 ounces) of cocaine. REUTERS/Albeiro Lopera

A protester smokes marijuana during a demonstration against penalties for the consumption of small amounts of drugs, in Medellin May 7, 2011. The government is proposing a sanction for the use of more than 20 grams (0.7 ounces) of marijuana and one gram (0.035 ounces) of cocaine. REUTERS/Albeiro Lopera

Protesters smoke marijuana during a demonstration against penalties for the consumption of small amounts of drugs, in Medellin May 7, 2011. The government is proposing a sanction for the use of more than 20 grams (0.7 ounces) of marijuana and one gram (0.035 ounces) of cocaine. REUTERS/Albeiro Lopera

A protester smokes marijuana during a demonstration against penalties for the consumption of small amounts of drugs, in Medellin May 7, 2011. The government is proposing a sanction for the use of more than 20 grams (0.7 ounces) of marijuana and one gram (0.035 ounces) of cocaine. REUTERS/Albeiro Lopera

A protester smokes marijuana during a demonstration against penalties for the consumption of small amounts of drugs, in Medellin May 7, 2011. The government is proposing a sanction for the use of more than 20 grams (0.7 ounces) of marijuana and one gram (0.035 ounces) of cocaine. REUTERS/Albeiro Lopera

Protesters prepare to smoke marijuana during a demonstration against penalties for the consumption of small amounts of drugs, in Medellin May 7, 2011. The government is proposing a sanction for the use of more than 20 grams (0.7 ounces) of marijuana and one gram (0.035 ounces) of cocaine. REUTERS/Albeiro Lopera

Protesters smoke marijuana during a demonstration against penalties for the consumption of small amounts of drugs, in Medellin May 7, 2011. The government is proposing a sanction for the use of more than 20 grams (0.7 ounces) of marijuana and one gram (0.035 ounces) of cocaine. REUTERS/Albeiro Lopera

Protesters smoke marijuana during a demonstration against penalties for the consumption of small amounts of drugs, in Medellin May 7, 2011. The government is proposing a sanction for the use of more than 20 grams (0.7 ounces) of marijuana and one gram (0.035 ounces) of cocaine. REUTERS/Albeiro Lopera