Mt. Pleasant, Michigan, USA, 420 Canna Expo, Amie Carter, an advocate for medical marijuana for children with autism, with her autistic son, Jayden Carter, 12. Canna Expo is a trade show for companies selling goods and services for the medical and recreational marijuana industry. Carter heads an organization called More Than Hope. She says her son has shown dramatic improvement since he began using cannabis. Michigan legalized recreational marijuana in 2018.