Taiwan’s Defense Ministry said Tuesday that Taiwanese troops fired warning shots at a Chinese drone that was flying in airspace over Kinmen County, an archipelago of Taiwanese-controlled islands off the southeastern coast of mainland China. The Taiwanese Army’s Kinmen Defense Command said that three “civilian” drones flew over the Kinmen islands, also known as Quemoy islands, and that Taiwanese troops fired warning flares, driving the drones away. But then another drone entered airspace over Erdan, an island in the archipelago that is only 2.5 miles from the Chinese mainland city of Xiamen....