FILE- In this March 9, 2017, file photo, Canadian Prime Minister Justin Trudeau takes part in roundtable discussion on the future of energy with industry leaders at CERAweek in Houston, Texas. Canada is behind eight U.S. states and Washington DC in allowing recreational marijuana use but in at least one respect its out in front: The government of Trudeau says the legal smoking age should be 18, and not 21. (Sean Kilpatrick/The Canadian Press via AP, File)
