Nov 3 (Reuters) - Transportation Secretary Sean Duffy

said Monday the Trump administration would shutter the U.S.

aviation system if he thought an ongoing government shutdown was

making it unsafe to travel.

"If we thought that it was unsafe... we'll shut the whole

airspace down. We won't let people travel. We're not there at

this point. It's just significant delays," Duffy told CNBC,

adding "absolutely there's more risk" during the ongoing

shutdown.

(Reporting by David Shepardson

Editing by Ros Russell)