Illinois Gov. Pat Quinn speaks prior to signing a medical marijuana bill at the University of Chicago Center for Care and Discovery in Chicago, Thursday, Aug. 1, 2013. The measure outli

 

              Illinois Gov. Pat Quinn speaks prior to signing a medical marijuana bill at the University of Chicago Center for Care and Discovery in Chicago, Thursday, Aug. 1, 2013. The measure outli
Illinois Gov. Pat Quinn speaks prior to signing a medical marijuana bill at the University of Chicago Center for Care and Discovery in Chicago, Thursday, Aug. 1, 2013. The measure outlines a four-year pilot program that requires patients and caregivers to undergo background checks and sets provisions for state-regulated dispensaries. (AP Photo/Scott Eisen)