What damage to all the computers.......

[gt55x]

What damage to all the computers or the to the Internet for that matter if someone created a electro magnetic pulse ?

I just seen some scince guy on telly done a test on how a electro magnetic pulse would have on a home compter.. and in the test enviroment the computer went blank....andeverything was wiped even the bios.

Imagine one of this things in the wrong hands....imagine bank computes and atm machines geting a blast everyones account's would be gone.

Its makeing me worryed that there is such technolagy out there what could wipe everything at a flick of a switch.