 Pete Buttigieg, U.S. Secretary of Transportation, told CNBC on Friday morning today that what the government is watching for over the course of the day as the issue has been identified is the kind of ripple or cascade effects as they get everything back in their networks back to normal. He said the FAA's operational systems like air traffic control are most systems within the U.S. Department of Transportation as well as major urban transit systems such as New York's MTA.