I would have to think that Fort Knox and Fort Benning, would be "safe" Fort Knox not only has the majority of the tanks not overseas, but it also has a massive "safe/vault" guarded by a mint police force, apaches, artillery, and over 30k soldiers. Oh and the doors are over 20+ inches thick. As for Benning, its a self supporting base for over 120k soldiers with tanks, some of the 75th ranger regiment, 3rd Heavy combat brigade, 3rd infantry, and most important, the 14th combat support hospital. I think Benning would be a place people would rally to on the east coast. Im not sure if i missed this part, but i would be VERY curious to know how Camp Pendleton is holding out in the story.