https://www.reuters.com/article/us-tech-antitrust-delrahim/u-s-justice-department-teams-up-with-states-on-probe-of-big-tech-firms-idUSKCN1VA1OR >The U.S. Justice Department is working with a group of more than a dozen state attorneys general as it moves forward with a broad investigation into major technology companies, the department's antitrust chief, Makan Delrahim, said on Tuesday.