5 DEFCON FIVE CODE BLUE DEFENSE NORMAL CONDITION MILITARY WARNING STATE OF READINESS FOR NUCLEAR WORLD WAR GAME OVER FIRST SECOND STRIKES

War game helps reinvigorate nuclear strategic thinking > Air Force Global Strike Command AFSTRAT-AIR > Article Display

Vietnam War - Wikipedia

DEFCON Levels

False Warnings of Soviet Missile Attacks Put U.S. Forces on Alert in 1979-1980

Defense R&D OUTLOOK by Faircount Media Group - Issuu

What do the DEFCON ratings of 1-5 mean? - Quora

Deter in Competition, Deescalate in Crisis, and Defeat in Conflict > U.S. Northern Command > Article

How to Understand the DEFCON Scale: 9 Steps (with Pictures)

Defcon Levels and What Each Color Means to Our National Security