Book excerpt: Police departments around the country are using drones, or unmanned aerial vehicles (UAVs), to assist in law-enforcement. This may include using drones for surveillance purposes, something that’s becoming increasingly controversial. Readers get a crash course in police UAVs with this text, which uses age-appropriate language and simple diagrams to explain the science and technology behind drones. STEM classroom concepts are supported by this science- and-technology-focused text, which asks readers to form their own opinions on the use of drones in police departments and beyond.