Tucson’s ubiquitous shopping cart
By Laura Fuchs/Arizona Sonora News Shaun runs the “cart master” during the morning shift at the Walmart on Wetmore Road in Tucson. The four-wheeled, battery-operated shopping cart pusher is controlled with a hand-held remote. Once he has the first steel cart in place, Shaun can nest up to 20 carts with a long red nylon…