Neither Walmart nor the state of North Carolina is stranger to drone delivery. UPS has participated in the Federal Aviation Administration's drone Integration Pilot Program in North Carolina over the last couple of years. And Walmart began testing drones, beginning with indoor flights, as early as 2015. Flytrex also participated in the FAA's IPP in North Carolina.
https://www.supplychaindive.com/news/walmart-grocery-drone-pilot-flytrex-delivery-faa/584965/