Michigan has become the first state in the Midwest to legalize recreational marijuana, after voters approved a ballot measure Tuesday. Here, a clerk reaches for a container of marijuana buds at Utopia Gardens, a medical marijuana dispensary in Detroit. Carlos Osorio/AP hide caption
A planter trims medicinal marijuana plants in Ontario in 2016. After months of preparation, Canada legalized recreational use of the drug on Wednesday. Lars Hagberg/AFP/Getty Images hide caption
Congress marijuana Bill Clark/CQ-Roll Call,Inc. via Getty Images hide caption
Washington State Patrol sergeant Nate Hovinghoff says once pot was legalized in Washington state the rules of engagement changed. Courtesy Austin Jenkins/Courtesy Austin Jenkins hide caption