Re: Not a nuclear scientist here...
Uhm... this may be a silly question... but what makes you think that they are only monitoring US Ports?
Team America! World Police. (Yes the version w the gratuitous puppet sex!)
(Sorry its Monday.)
But seriously, the proliferation of nukes should scare the shit out of most. Even if you live in the UK and someone did an air burst above San Francisco, (think high EMP low casualties) ... You'd still be royally fscked.
And vice-vesa. (Living in the US and London taken out w EMP burst.) Are your civilian data centers protected against EMP bursts? I doubt it.