Equally there are security concerns having sites inside the US.

I'd rather have it somewhere stable like Switzerland

I suspect the only reason this hasn't been used as part of "deal leverage" is because the US regime doesn't know of its existence

The USA has shown, over the last 12 months, what a security-conscious country it is. The Defense Secretary's almost fanantical regard for messaging security should be held up as an object lesson for all future generations.