A demonstrator wearing a hair decoration in the shape of a cannabis leaf attends a march in favor of the legalization of marijuana in Sao Paulo, Brazil, Saturday July 2, 2011. The Brazilian Supreme Court ruled on June 15, 2011 that demonstrations favoring the legalization of cannabis are an exercise of free expression and do not encourage people to consume it. (AP Photo/Nelson Antoine)

Associated Press
A demonstrator wearing a hair decoration in the shape of a cannabis leaf attends a march in favor of the legalization of marijuana in Sao Paulo, Brazil, Saturday July 2, 2011. The Brazilian Supreme Court ruled on June 15, 2011 that demonstrations favoring the legalization of cannabis are an exercise of free expression and do not encourage people to consume it. (AP Photo/Nelson Antoine)
A demonstrator wearing a hair decoration in the shape of a cannabis leaf attends a march in favor of the legalization of marijuana in Sao Paulo, Brazil, Saturday July 2, 2011. The Brazilian Supreme Court ruled on June 15, 2011 that demonstrations favoring the legalization of cannabis are an exercise of free expression and do not encourage people to consume it. (AP Photo/Nelson Antoine)
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