Travel Now that marijuana is legal in Illinois, there are pot amnesty boxes at Chicago’s airports January 10, 2020Jayme Deerwester and Morgan Hines, USA TODAYComments Off on Now that marijuana is legal in Illinois, there are pot amnesty boxes at Chicago’s airports Weed officially became legal in Illinois on Jan. 1 which came with a curious side effect: Chicago's airports have set up "cannabis amnesty boxes."