What is the acronym referring to a scale of readiness in the US military, derived from 'defense readiness condition'?
DEFCON-1 DefCon Defcon Defense Readiness Condition DEFCOM Defense readiness condition DEF-CON DEFCON 5 DEFCON 4 Defcon 5 DEFCON 2 DEFCON 1 DEFCON 3 Defense condition D.E.F.C.O.N. Defense Condition Def con DEFCON