National Security Agency “Site M” Expansion Development Plan and Anti-Terrorism Force Protection Assessment from May 31, 2011. The Site M Area Development Plan (ADP) for the National Security Agency/Central Security Service (NSA/CSS) coordinates the development of facilities on Site M at Fort George G. Meade (Ft. Meade), allowing for growth and expansion over time. Site M development is planned to consist of administrative buildings, operation buildings, High Performance Computing Centers (HPCC) and associated support facilities. The objective of the AT/FP component is to develop a plan for protection of the proposed Site M development. This plan is based on the mandatory DoD minimum antiterrorism standards as well the specific requirements of NSA/CSS Ft. Meade. The plan provides overall guidance for development of the site as well as specific design strategies for key AT/FP components. A layered approach to security has been applied to ensure probability of detection with low false and nuisance alarm rates.