In early 2019, a bug in group FaceTime calls would have let attackers activate the microphone, and even the camera, of the iPhone they were calling and eavesdrop before the recipient did anything at all. The implications were so severe that Apple invoked a nuclear option, cutting off access to the group-calling feature entirely until the company could issue a fix. The vulnerability—and the fact that it required no taps or clicks at all on the part of the victim—captivated Natalie Silvanovich.