do SFGate
Medical marijuana users near San Francisco lit up Saturday at the opening of the two-day International Cannabis and Hemp Expo, where vendors displayed bongs, vaporizers, hash brownies and other marijuana-related products.
Organizers of the event at the Cow Palace said they insisted on having an onsite medicating area before holding the expo. Under a white-canopied courtyard, young adults in baggy jeans and baseball caps smoked alongside aging hippies.
Adrian Hernandez said marijuana use helps him deal with chronic knee pain.
"Everybody needs their medication when they need it," said Hernandez, who is in his 30s. "We'd have to step out and go hide in our cars."