it will turn into a volcano as well. >> and i've seen pictures of the volcano, where it looks like lightning inside it, almost. why is that happening? >> absolutely, lightning. lightning is all the time, with a volcano like this. this is not kilauea like in hawaii where the lava slowly oozes out. this is an explosive charge of gases and ash thrown up into the sky. and when it's thrown up into the sky, at literally hundreds of miles per hour, it's like 1 million little people rubbing their feet on the carpet making shocks and making spark in the winter time when the humidity is low. you rub your feet, touch the doorknob, you get a shock. this is now rubbing all of these ash particles together, creating static, and the static electricity is one gigantic lightning show. >> chad, appreciate it. air travel is still a mess tonight, not nearly as big a mess as yesterday, although the backlog remains huge. i want to show you what the air space over europe and the atlantic ocean looks like tonight.