They had plans to bomb something south of that airport, they had to postpone those plans now that the info is public enough that whatever their target was is definitely aware of those plans.
I don't, and since neither of us can know for sure given the info we've been given, it's useless for us to argue about our opinions.
https://www.cbsnews.com/news/airspace-closure-followed-spat-...
Liz Truss begs to differ.