Just that many more of them are present in the atmosphere than reentering space debris pieces.

Don't worry, if it can be blamed on Boeing, it will be.

> it seems weird that glass fragments would be projected inward in that scenario

At speed, I don't know what the outside pressure on the windshield would be, but I'd be surprised if it was lower than the cabin air pressure.

After all, it is called a wind "shield".

There are pictures of the outside where you can clearly see impact damage to the top of the window frame.

Much higher than a few decades back, but still effectively zero. Even after putting up X thousands of satellites up into orbit, they still physically cover a tiny total surface area. And the same goes for planes. So two of these colliding would be a monumental freak accident, which is why I'm still assuming it's not space debris until more information shows up.

And in tank warfare this is called spalling

A projectile hits the armor and doesn't penetrate it, but the armor inside still fragments and injured the operators

I can't remember the species, but there's a bird that files crazy high. I think it's a vulture.