Communities across the Nation experience a diverse set of threats, hazards, and events. The size, frequency, complexity, and scope of these incidents1 vary, but all involve a range of personnel and organizations to coordinate efforts to save lives, stabilize the incident, and protect property and the environment. Every day, jurisdictions and organizations work together to share resources, integrate tactics, and act collaboratively. Whether these organizations are nearby or are supporting each other from across the country, their success depends on a common, interoperable approach to sharing resources, coordinating and managing incidents, and communicating information. The National Incident Management System (NIMS) defines this comprehensive approach.