Under which FPCON level is there an indication that some form of terrorist action is likely?

The correct answer indicates that at the Charlie level of Force Protection Condition (FPCON), there is a credible indication that some form of terrorist action is likely. This level signifies heightened alertness, with specific heightened security measures implemented to prepare for potential threats.

FPCON Charlie is intended to reflect a situation where there is information suggesting that an attack is imminent or has been planned, making it crucial for security personnel to remain vigilant and ready to respond to various scenarios. It typically results in increased patrols, tighter access control measures, and enhanced monitoring of activities in and around the facility to prevent any potential attack.

This level is more serious than Alpha and Bravo, which reflect lower levels of perceived threat, while Delta signals that a terrorist attack has occurred or is in process. The distinction among these levels allows security personnel to adopt the appropriate level of readiness based on the assessed risk at any given time.