an invasion by whose standards?- the kind you are familiar with or the lay persons standards for which 9/11 would surely qualify. And it qualifies by definition as well.
Suspending the writ-to hold them- as a preventative measure-
why would the legal system have to be overwhelmed to make a palusible choice? I don't think that's the intention do you?
(fyi- before everyone piles on here- this is for the sake of discussion and not my personal opinion)