The doomsday weapon Putin could use to cripple the West

During the Cold War, both America and the Soviet Union explored the idea of using nuclear explosions to create a silent electromagnetic pulse (EMP) to cripple an enemy. Details of the US project, called Starfish Prime, have subsequently been declassified, revealing those early scientists were surprised by what they found... So could Russia, China or North Korea use this catastrophic threat to hurt us?... “You need a sufficient power level to cause damage over a wide area, and it’s hard to get that into a satellite,” says Thomas Withington, of the Royal United Services Institute.