Posted in USA / North America Jim Woolsey: Electromagnetic Pulse (EMP) is existential threat to America Author: puzzleman Published Date: July 30, 2013 Leave a Comment on Jim Woolsey: Electromagnetic Pulse (EMP) is existential threat to America Jim Woolsey: Electromagnetic Pulse (EMP) is existential threat to America Americans might be blacked out for as long as two years Center for Security Policy Author: puzzleman