Product in case in Ground Swell cannabis dispensary
In this Monday, April 16, 2018, photo, products sit in a case inside Ground Swell cannabis dispensary in east Denver. America's marijuana supporters have a lot to celebrate on this 420 holiday: Thirty states have legalized some form of medical marijuana, according to a national advocacy group. Nine of those states and Washington, D.C., also have broad legalization where adults 21 and older can use pot for any reason. Michigan could become the 10th state with its ballot initiative this year. Yet cannabis remains illegal under federal law, and it still has many opponents. (AP Photo/David Zalubowski)
