Even those "needs" need to be balanced against having an open legal process. We have both NSLs and a "no fly list." For the purpose of keeping some very high-value suspect from fleeing, the no fly list should be sufficient. This looks like an exercise of power just to maintain and expand secrecy and the supremacy of "national security" over legal process.
I'm not trying to argue secrecy is right in this case — I don't know enough. I'm just saying that anyone (including the ACLU!) should recognize that limited & temporary secrecy is really important in combating crime or fighting wars. The question is just how we make sure it is limited, temporary, and really only applied to the right things — and not used as a way to cover up/hide information which should be public.
> * recognize that limited & temporary secrecy is really important in combating crime or fighting wars*
How important? Quantify that. Start at zero, and then justify all the really vital things. You may find there are actually zero existential threats if some super-Snowden revealed all secrets.
