A White House official says the Salt Typhoon hack has impacted eight telecom companies in the United States, with dozens of other countries also affected, and has been in motion for as long as two years. The information comes as U.S. administration officials said earlier this week that the hacking group, linked to the Chinese government, is still believed to be in U.S. telecom networks. The government began investigating the breach this past spring, and are continuing to assess its full scope.Th...