Final answer:
Organizations like the National Search Dog Alliance provide volunteer search and rescue dogs and handlers for free to assist public agencies during emergencies.
Step-by-step explanation:
Several organizations train and provide volunteer search and rescue dogs and handlers to assist public agencies during emergencies, often at no charge. One prominent example of such an organization is the National Search Dog Alliance (NSDA), which works across the United States to support search and rescue efforts. These volunteer teams are critical resources that help locate missing persons in a variety of situations, ranging from natural disasters to missing children cases. Handlers and their dogs undergo rigorous training to ensure they are prepared for the complex demands of search and rescue missions.