You've touched the same point that came to my mind the first time I've heard to your audios. Brussels event also came.
In the moment a Delta - I think Delta - pilot says there's people running out of the terminal and going out to the taxiways; the whole airport should have been closed. At the very precise moment. People panicking, going on an enourmous ground that they obviously don't know and running to nowhere. "Everybody stop" if there are persons walking the airport on their own.
Departures continued and more landings. Arrivals who were given short of Tangos (ramp entries) and shutdowns.
I haven't heard the second you sent yet. I've been editing the first one into a video I'll publish tomorrow. After that, I'll go over the Approach for diversions