NIST is working to establish models for smart and secure cities through its Global City Teams Challenge program. The program brings together technology innovators, cities, and other stakeholders to collaborate on projects that improve quality of life using IoT and cyber-physical systems. Example projects address issues like emergency response, transportation, and utilities. Over 200 cities worldwide have participated, working in clusters on shared challenges and opportunities. The goal is to demonstrate replicable, scalable, and sustainable smart city solutions with built-in security and privacy protections.