A breach of contract on the plaintiff's side could but not necessarily will nullify the NDA.
The best outcome for Snowden I think would be if he can demonstrate a greater good, IE: that breaking this contract prevents a larger crime, that would be up to the court to decide.
I find it interesting to see that the DOJ is not trying to prevent publication, just trying to intercept financial gains based on the premise that he didn't submit copy for review. At this point they are not claiming that he is actually publishing any confidential material.
Somehow I doubt Snowden's main motivation for publishing this book is financial, so I don't know if this will hurt him much..
My understanding is they're enforcable for the rest of your life.
I'd expect to see this if anybody published a book without clearance. It's only newsworthy because it's Snowden.
Now, I'd also expect Snowden to make sure he is not breaching those NDA's. Afaik, he is not one to make these types of mistakes. Looking forward to his response.
You... you know who Snowden is, right?
Surely the NSA/CIA's NDAs are permanent?