Certainly that would be a problem for the US. Over a century since war (as opposed to terrorism) has touched the continental US[1] means that no one alive reme

Certainly that would be a problem for the US. Over a century since war (as opposed to terrorism) has touched the continental US[1] means that no one alive remembers that being a problem, and it shows. [1]: except $500 of damage from a Japanese submarine in 1942, perhaps.