There's a totally plausible explanation here. Hegseth ordered some sort of military drill or test without going through proper channels. When FAA reached out to tell him it was jeopardizing airport safety Hegseth told them to pound sand. FAA then closed the airport to publicly embarrass Hegseth.

I gotta say that with this administration malice permeates every motivation and stupidity permeates every execution

Trump: What they did is PUNISHABLE BY DEATH!!!

Grand Jury: Motherfucker, it’s not even indictable.