Usually in anticipation of a war.

At this Readiness level, Aircaft Crews are usually in such position that they can launch their already armed & prepared aircraft in a matter of minutes. Land & Sea forces are also on high alert.

DEFCON 2 has been achieved only twice since its creation. The first time was a brief period during the Cuban Missile Crisis, and the second on 9/11/02, for over 24 hours.

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