That bomb had a yield of 1.4 megatons - miniscule in comparison to today's nukes - but the EMP blast still disrupted electrical and communication systems in Hawaii over 500 miles away from the ...

Thomas Withington, of the Royal United Services Institute, added that any weapon used to deliver an EMP blast would need to have "a sufficient power level to cause damage over a wide area ...

U.S. President Donald Trump threatened Sunday to cut off all trade with countries doing business with North Korea, an ...