By Nick Carey BEVERLY, Mass. (Reuters) – United Parcel Service Inc said it began testing the use of drones for emergency deliveries of medical supplies this week with a flight in rural Massachusetts, which the company hopes will eventually lead to federal approval of drones as a regular delivery option. The test flight on Thursday was handled by CyPhy, a Danvers, Massachusetts-based drone maker in which UPS, the world’s largest package delivery company, owns a […]