Today's USA today says the Govt wants to resume nuclear tests in Nevada.
It has been awhile since one of these things has been shot off above ground,
but the population of Nevada has grown.
The bomb(s) send out EMPs (electro magnetic pulses) that destroy solid-staer
equipment like computers and radios.

How far away will an EMP reach?

http://www.usatoday.com/news/washing...ear-usat_x.htm