In May 2018, US Immigration and Customs Enforcement abandoned the development of machine learning software intended to mine Facebook, Twitter, and the open Internet to identify terrorists. The software, announced in the summer of 2017, had been a key element of president Donald Trump's "extreme vetting" programme and expected to flag at least 10,000 people a year for investigation. ICE decided instead to opt for a contractor who could provide training, management, and human personnel to do the…