dr riggs opposed the legalization of marijuana. and alison hoken is a director and wrote the ballot measure that legalized marijuana there and joined us from seattle. >> you worked hard for this legalization, but you have a 4-year-old to whom at some point you'll explain the dangers of the marijuana. how will you strike the balance at home. >> i think i'll have to do it the same way i strike the balance when it comes to shol, cigarettes or the other risky behaviours that the young will engage in. i have to have an honest conversation about what the risks or personal goals are for my child's upbringing. >> more than 60% of america's youth believe that marijuana is a low-risk drug. it's illegal under federal law, yet the president equated it to cigarettes and alcohol. how do young people reconcile that mixed message? >> i agree that - i think that kids are getting a mixed message, and it's difficult for adults to get the facts, the science-based facts about the health impacts of marijuana, so they can make a good decision for themsel