Which of the following is NOT one of the 4 Ds techniques for counter-terrorism?

The correct answer is discern because it is not one of the widely recognized 4 Ds techniques for counter-terrorism. The 4 Ds refer to four critical strategies that are employed to prevent and respond to terrorist threats: deter, detect, delay, and defend. Each of these strategies plays a specific role in a comprehensive counter-terrorism approach.

Deter focuses on discouraging potential terrorist acts through visible security measures and the enforcement of laws. Detect involves identifying threats through surveillance, intelligence gathering, and monitoring suspicious activities. Delay pertains to making it more challenging for terrorists to carry out their plans, for instance, by implementing checkpoints or creating barriers.

In contrast, discern is not a recognized technique within this framework. While it might seem relevant in the context of assessing situations or identifying threats, it does not fit into the categorization of the established 4 Ds. This distinction highlights the importance of familiarizing oneself with the actual terminologies and concepts used in counter-terrorism to effectively understand and apply these strategies.