Threatcon Charlie

Threatcon Normal -- No threat of terrorist activity in present.

Threatcon Alpha -- There is a general threat of possible terrorist activity against installations, building location, and/or personnel, the nature and extent of which are unpredictable.

Threatcon Bravo -- There is an increased and more predictable threat of terrorist activity even though no particular target has been identified

Threatcon Charlie -- An incident has occurred or intelligence has been received indicating that some form of terrorist action is imminent.

Threatcon Delta -- A terrorist attack has occurred or intelligence has been received that action against a specific location is likely.