FILE - This Thursday, Dec. 21, 2017 file photo shows the MedMen marijuana dispensary in Los Angeles. When U.S. Attorney General Jeff Sessions green-lighted federal prosecutors to pursue violators of federal marijuana laws, not only states that legalized recreational pot are at risk of a crackdown, but so is most of the rest of America. All but four states allow some form of medical marijuana, even Sessions' home state of Alabama. (AP Photo/Richard Vogel, File)