Michael Brown, director of the Defense Innovation Unit, has been picked to become the Pentagon's acquisition chief, putting a new spotlight on a career previously spent in Silicon Valley and a public profile focused on countering Chinese technology. Brown has led DIU, the Pentagon's innovation outpost in Silicon Valley, since September 2018. He is the former CEO of cybersecurity firm Symantec, where he worked between 2014 and 2016. In November 2016, Brown became a Presidential Innovation Fellow with the Trump...