We watched Body of Lies with Leo and Russell Saturday night - feeling a bit of paranoia now.
DEFCON 5
This is the condition used to designate normal peacetime military readiness. An upgrade in military preparedness is typically made by the Joint Chiefs of Staff and announced by the United States Secretary of Defense. DEFCON 4
This refers to normal, increased intelligence and the heightening of national security measures.
DEFCON 3
This refers to an increase to force readiness above normal. Radio call signs used by American forces change to currently classified codes.
DEFCON 2
This refers to a further increase in force readiness just below maximum readiness. The most notable time it was declared was during the Cuban Missile Crisis, although the declaration was limited to Strategic Air Command. It is not certain how many times this level of readiness has been reached.
DEFCON 1
This refers to maximum readiness. It is not certain whether this has ever been used, but it is reserved for imminent or ongoing attack on US military forces or US territory by a foreign military power. 