Aircraft carriers have played an important role in the military for over 100 years. These floating airports have evolved over time to provide a base for jets, helicopters, airplanes, and thousands of sailors at sea. This book introduces young readers to the history of aircraft carriers with facts about their use in the U.S. Navy. Full-color photographs bring the massive machines to life and help readers understand how they operate. Readers look beyond the flight deck to see how all the moving parts come together and keep these massive machines afloat.