In the early morning of September 9, 2016, Bill Moore, CEO of the Austin-based walkie-talkie app company Zello, contacted the Middle East Media Research Institute. He was seeking a copy of a report MEMRI had recently published describing how ISIS members and supporters were using Zello, which allows people to send voice messages to each other in private and also public channels. Moore had learned about the findings through a Google Alert.

Get in-depth coverage of current and future trends in technology, and how they are shaping business, entertainment, communications, science, politics, and society.