Yes. It is the physics principle which states that if you stick to science and facts, you will succeed. That has been repealed by the government, which has instituted the policy where if you don't say what the government wants, you no longer get funded.
From 1945-1992 there were over ONE THOUSAND NUCLEAR BOMB TESTS done in the United States.
How many 'electrical grids' went down ?
You don’t understand, this is “special” science that has its own physical laws, passed by congress, and signed by Bo.
An EMP is a result of a nuclear bomb which has been set off in the upper atmosphere. Tests were done in the early 1960’s. See “Starfish Prime”:
http://en.wikipedia.org/wiki/Starfish_Prime
Scroll down and it talks about damage done to the grid in Hawaii.