May I ask when you people were born?
Are you aware that nuclear weapons
as powerful as those in Pakistan's and Indian's arsenal
were tested in New Mexico??
And may I ask how much you know about nuclear physics?
Did you know that radiation from Chernobyl reached the US? Sure, it wasn't much, but there was some.
OTOH, I'm not the one who brought up Alaska: I think Alaska probably wouldn't get too much radiation. The rad count wouldn't be much more than a particularly fierce solar storm, IMO. But, unless and until there is a nuclear exchange, it is impossible to say for sure what the results would be: there has never been more than one nuke set off at a time.
It appears possible that India and Pakistan will oblige us in providing a test bed for this experiment.
Tuor