This document presents recommendations for incorporating sound security considerations into the planning, design, construction, and modification of security-related airport facilities and airport terminal buildings. It consolidates information developed through the participation of the Transportation Security Administration (TSA) and other government and aviation industry professionals. The information in this document was gained through the experiences of a broad range of aviation security programs and projects at numerous United States (U.S.) airports, and through the continuing efforts of government and industry to develop improved approaches to incorporating cost-effective security features into the early planning and design of airport facilities. The information is presented here in a single document, which will be revised and updated periodically as regulations, security requirements, and technology change.