Lockheed Martin drones are on display during the 2019 SXSW Trade Show on March 12, 2019 in Austin, Texas. The company partnered with The Drone Racing League (DRL) on the AlphaPilot Innovation Challenge, challenging teams of students, coders and technologists to develop, test and race high-speed, self-flying drones.Photo: Suzanne Cordeiro (Getty Images) So far, 21st-century …