FILE - In this Feb. 1, 2011 file photo, medical marijuana patient 

FILE - In this Feb. 1, 2011 file photo, medical marijuana patient Douglas Klann, left, is shown bags of marijuana by clerk Jason Matthys at Harborside Health Center in Oakland, Calif. An Oakland medical marijuana dispensary that bills itself as the world's largest has gained a powerful ally in its fight to stop the federal government from shutting it down: the city government. The city of Oakland has filed a federal lawsuit that seeks to prevent the U.S. Department of Justice from using its property seizure powers to get Harborside Health Center evicted. (AP Photo/Jeff Chiu, file)
Associated Press
FILE - In this Feb. 1, 2011 file photo, medical marijuana patient Douglas Klann, left, is shown bags of marijuana by clerk Jason Matthys at Harborside Health Center in Oakland, Calif. An Oakland medical marijuana dispensary that bills itself as the world's largest has gained a powerful ally in its fight to stop the federal government from shutting it down: the city government. The city of Oakland has filed a federal lawsuit that seeks to prevent the U.S. Department of Justice from using its property seizure powers to get Harborside Health Center evicted. (AP Photo/Jeff Chiu, file)
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