[KarlInOhio]

Remember that ash cloud? It didn't exist, says new evidence

Didn't exist? BS.

Not have been as dense as predicted by computer models? Maybe.

Safe to fly through? I wouldn't have bet on that with my planes and passengers without a lot more testing of the ash and my engines. I doubt that GE or Pratt&Whitney have much advice on volcanic dust other than "Avoid it".

Great chance for flying a plane through it (or at least the edges) or flying weather balloons through it to take samples to see how accurate the computer models are? Yes, but it sounds like it was missed.

[cripplecreek]

Obviously the ash existed but what didn’t exist was actual hard data on location and density.

[Tzfat]

Safe to fly through? I wouldn't have bet on that with my planes and passengers without a lot more testing of the ash and my engines. I doubt that GE or Pratt&Whitney have much advice on volcanic dust other than "Avoid it".

Ash clouds, or particles carried a thousand miles? There is a difference, and you are incorrect.