text:  And when you're talking about the aviation industry, there are a lot of redundant systems on planes so that if something critical breaks, there is a backup plan and you can still land the plane. But as we are seeing today, there is not that same kind of redundancy, I think, when it comes to the IT systems that keep the airlines and the transportation system moving. That is NPR's Joel Rose as well as Jen McLaughlin. Thanks to both of you. You're welcome. Thank you.