"The links can be easily interrupted by various forms of interference. Usually, the outages last only a few seconds and are harmless. Just in case, drones are programmed to fly in a circular pattern until the links are restored. In worst-case scenarios, they are supposed to return automatically to their launch base. Records show that does not always happen. In more than a quarter of the accidents examined by The Post, links were lost around the time of the crash. Several pilots told investigators that they were so accustomed to lost links that they tended not to get nervous unless the disruptions lasted for more than a few minutes. “I’d say after the three- or five-minute period, you sort of get the feeling that the plane just stopped talking to us and we may not recover this one,” a Predator pilot testified after an April 20, 2009, crash in Afghanistan."