Federal officials are digging into policy gaps exposed by the SolarWinds hack, including shortcomings in cyber info-sharing, and weighing actions the United States will take against a highly sophisticated threat actor in response to the massive infiltration of government and private-sector systems, according to deputy national security adviser for cyber Anne Neuberger. "We're also working on close to about a dozen things -- likely, eight will pass to be part of an upcoming executive action to address the gaps we...