Have you seen the movie Wargames?If not, go and watch it now, its amazing. You may have seen the DEFCON sign on the walls at NORAD. This sign shows the current Defence Readiness Condition (thus the name) in order from
DEFCON Sign

Have you seen the movie Wargames?If not, go and watch it now, its amazing. You may have seen the DEFCON sign on the walls at NORAD. This sign shows the current Defence Readiness Condition (thus the name) in order from