All is well, this is not the AIpocalypse. Just some dude fucking up something stupid, as usual.
If there was an attack on your country, my phone wouldn’t stop ringing, just like it did 9/11.
All I am getting is pictures of baked cookies right now. So there is no attack on your country.
Planes are not falling out of the sky, as you can see on publicly available platforms. Nothing is exploding on the ground, besides the poor souls choosing Taco Bell for dinner.
I am confident you will not be abducted or murdered by Aliens today either, pinky promise.
So whatever happens is not an immediate danger to the planes still in the air. And no danger to anyone on the ground.
The most simple explanation is that the communication between ground and air is not working properly, and as this is necessary to safely fly thousands of planes simultaneously, they should rather stay on the ground for safety reasons until they figure out what is wrong.
If you have any specific concerns not addressed above, feel free to share them.
Probably someone prompted an agent: solve global CO2 emissions :-)
Maybe look further than Twitter.
The legitimate media from the New York Times to CNN and beyond all showed video of his news conference 20 minutes before your post.
Looking at LAX departures, it looks like nothing has departed since about 10:30 AM PST, and everything later is showing Delayed or Cancelled. There are times after Delayed, but it's not clear those times mean anything. Some are now in the past.
"flysfo.com" is too overloaded to display departures. Stuck at "loading...".
JFK departure status shows almost solid "Delayed".
No good explanations anywhere.