$WKHS ouch!! Plenty of other companies, including Amazon itself, have been tinkering with drone technology that can fly and drive deliveries of goods ranging from coffee to COVID tests, but few have attempted to launch and control them directly from vans themselves. Truck manufacturer Workhorse Group (NASDAQ: WKHS) is one of them, but its model, which attaches mounted drones atop delivery vehicles, has borne little fruit, with several buyers reporting serious malfunctions.