Which of the following is NOT a level of Force Protection Conditions?

In the context of Force Protection Conditions (FPCON), the established levels are specifically designed to provide guidance on the posture military personnel and installations should adopt in response to specific threats. The recognized conditions are Alpha, Bravo, and Delta, which represent different levels of security measures to be implemented based on the assessed threat level.

Each of these conditions indicates an increasing level of vigilance and restrictions, with Alpha being the most basic level and Delta representing a heightened state of alert and security. The absence of "Echo" as a recognized FPCON level demonstrates that it does not fit within the established framework. Therefore, selecting "Echo" correctly identifies it as the non-existent level among the official Force Protection Conditions. Understanding these levels is essential for military readiness and ensuring the safety of personnel and assets in various threat environments.