This guide supports planning for Complex Coordinated Terrorist Attacks (CCTAs) and provides a summary of their unique characteristics. The document builds on Comprehensive Preparedness Guide (CPG) 101: Developing and Maintaining Emergency Operations Plans, and CPG 201: Threat and Hazard Identification and Risk Assessment (THIRA) Guide by providing planning considerations specific to CCTAs, which are relevant both to developing a plan and to completing a THIRA.
https://www.fema.gov/media-library-data/1532550673102-c4846f270150682decbda99b37524ca6/Planning_Considerations-Complex_Coordinated_Terrorist_Attacks.pdf