Aviation is an example of the incredible power of technology. From the simplest glider to the most impressive jet engine, aviation has played a role in entertainment, the military, travel, and more. Flying technology also saves and improves lives around the world. This book provides readers with a before-and-after look at the way the world changed with the development of flying technology. Each book in the NGSS-aligned It Changed the World series introduces readers to some amazing inventions. Interesting facts and vivid photos show how these inventions changed, and continue to change, the lives of people around the world. Each book includes a glossary, comprehension questions, and an extension activity for further learning.