Yahoo News:  “In the 2010 fall elections, Arizona passed a law legalizing medical marijuana in the state. Though the new law passed by a slim margin and some residents weren’t pleased by its passing, many considered it a victory and step in the right direction.  Despite the public’s opinion, though, police officers throughout Arizona must study up on the new medical marijuana laws in order to best regulate the substance. Here’s everything you need to know regarding Proposition 203’s medical marijuana law in the state of Arizona.”