"No cannabis at border crossings." The signs posted on the Canadian side of Ontario's Thousand Islands crossing into the United States couldn't be more clear. They're punctuated with a logo featuring a pot leaf inside a red circle with a red slash through it. U.S. and Canadian flags fly on the Peace Arch monument at the U.S.-Canadian border near Blaine, Wash., and Surrey, B.C., on Sept. 26, 2018. On Oct. 17, 2018, Canada will become the second and largest country with a legal national marijuana marketplace, in contrast to the United States, where the federal government outlaws marijuana while most states allow medical or recreational use for people 21 and older. THE CANADIAN PRESS/AP-Ted S. Warren
