What we know about the FAA nationwide ground stop

The Federal Aviation Administration took an extraordinary step Friday afternoon by issuing a nationwide ground stop. No planes are taking off at any airport and millions of passengers are stranded.

<p>The Federal Aviation Administration took an extraordinary step Friday afternoon by issuing a nationwide ground stop. No planes are taking off at any airport and millions of passengers are stranded.</p><img src='https://media.npr.org/include/images/tracking/npr-rss-pixel.png?story=nx-s1-6040388' />