On July 6, a small fixed-wing drone flew into Ukraine's Zaporizhzhia with about five others, none of them transmitting radio signals. Operators had launched them towards a petrol station 14km from the front line, and the drones had no radio link back to them. As it came in, the drone's software chose what to hit, most likely the propane tanks it had been trained to recognise, according to a New York Times investigation published on August 24. The drone missed, struck the wall of an apartment building and exploded near people sheltering there. Tetiana Bubynets, a 19-year-old accounting student at…