There is traditional medicine, and there is the growing field of medical marijuana. Although illegal on the federal level, Michigan is one of a number of states that has legalized marijuana for medical use. With nearly two dozen medical marijuana facilities in Washtenaw County, you have likely walked past several in your community and not even realized what it is. 89.1 WEMU's Lisa Barry takes you inside several local provisioning centers as part of our "Hidden In Plain Sight" series...