Mothers who support Proposition 19 held a press conference in California yesterday to make the case for regulating marijuana and removing it from an illicit market that makes it readily available to young people. (Video below) “When I think of what kind of world I’d like my children to grow up in, [I’d like] that they grow up in a world with marijuana being legal and controlled, and not this out of control system that we have today,” said Hannah Liebman Dershowitz, an attorney and mother of two kids,…