The announcement of the new “air defense” system was issued from Changzhou. A company called Photon Matrix Lab claimed to have developed a new technology for identifying and eliminating deadly threats mid-flight. A video on Indiegogo showed potential buyers how it works: After detecting a mosquito, the device fires off what looks like a blue-violet lightning bolt. When struck, the insect does not just fall straight down, no—it is more satisfying than that: Its body somersaults and tumbles out of the frame, bringing its career of vampiric air raids to a sudden end. Photon Matrix Lab had my attention. Under normal circumstances, a mosquito lives for just a few weeks, and in that time, its wings will carry it a few miles or so, at most, from the pond or puddle of its birth—but for some reason, I am almost always within range of one. The bugs seem to have a primal knowledge of my whereabouts, and a craving for my blood that goes beyond mere thirst. In a span of minutes, they will perforate …