A woman exhales while smoking marijuana during the annual 420 marijuana rally on Parliament Hill in Ottawa, Canada, Wednesday, April 20, 2016.
A woman exhales while smoking marijuana during the annual 420 marijuana rally on Parliament Hill in Ottawa, Canada, Wednesday, April 20, 2016. Justin Tang AP
A woman exhales while smoking marijuana during the annual 420 marijuana rally on Parliament Hill in Ottawa, Canada, Wednesday, April 20, 2016. Justin Tang AP