A woman exhales marijuana smoke during the annual 420 pot rally on Parliament Hill in Ottawa, Canada, on April 20, 2016.
A woman exhales marijuana smoke during the annual 420 pot rally on Parliament Hill in Ottawa, Canada, on April 20, 2016. Justin Tang The Associated Press
A woman exhales marijuana smoke during the annual 420 pot rally on Parliament Hill in Ottawa, Canada, on April 20, 2016. Justin Tang The Associated Press

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