What significant action did PPD 21 undertake?

The significant action that PPD 21 undertook was the establishment of 16 critical infrastructure categories. This effort was part of a broader initiative to enhance the nation's resilience against various threats, including natural disasters, cyberattacks, and other hazards. By identifying and categorizing these critical infrastructures, the administration sought to provide a framework for protecting essential services and systems that are vital to national security, economic stability, and public safety.

The classification into these categories allows for a more organized approach to managing risks, coordinating responses, and implementing protective measures across different sectors. This strategic framework enables stakeholders, including government agencies, businesses, and communities, to work together effectively to safeguard their infrastructures against disruptions.

Establishing these categories reflects a comprehensive understanding of how interconnected various systems are, which is essential for ensuring a resilient infrastructure landscape in the face of evolving challenges.