Well, the New England bit of anyway ...
Well, according to Republican House of Representative member for Maryland Roscoe Barlett (great name, fella), you need a boat, $100,000 to buy a scud-missile launcher, and a crude nuclear weapon. Then you fire it into the sky and set it off.
The electro-magnetic pulse from such a weapon "might not paralyze the entire United States, Roscoe concedes, "But you could shut down all of New England. And if you missed by 100 miles, it’s as good as a bulls eye"."
Hardly a doomsday weapon by any stretch of the imagination, though surely if any rogue state or terrorist organisation actually HAD such a system they'd go for the wide-spread and altogether more attention-grabbing loss of life by firing it AT a major city, rather than wasting it inconveniencing a few New Englanders who find their TVs don't work no more?