Using marijuana for medical purposes is allowed in thirteen states but against federal law. However, U.S. Attorney General Eric Holder recently signaled that the Obama administration will let states enforce their own laws about marijuana. I wanted to learn more about the subject and thought our audience would too. So I was happy when two experts in the field, Herb Kleber, M.D. and Mitch Earleywine, Ph.D. agreed to join me for a discussion of the pro's and con's. They totally disagreed on fundamental issues, yet they treated each other with respect and carried on a civil and informative discussion. When the cameras stopped rolling, they continued their animated conversation. I loved seeing that. And I hope you'll enjoy their debate.