Ars Technica: DOJ reportedly launches its own Facebook probe at AG Barr’s urging. “Facebook, it seems, is continuing to shatter records of all sorts. Usually, regulators at the Federal Trade Commission and Department of Justice agree to conduct antitrust probes against a company one at a time, deciding in advance who should take the lead and run with it. According to a new report, though, the US attorney general has decided that one federal investigation just isn’t enough.”