Drones are a Modern Engineering Marvel! In this engaging title, readers will explore the history of drones from hot air balloons to radio-controlled aircraft to today's unmanned aerial vehicles. Reginald Denny and his development of radio-controlled planes for the US military is featured, and a colorful infographic shows the parts of a drone. Readers will learn how different types of drones work and see the future of drones from weather monitoring to delivering packages! A timeline, a glossary, and an index supplement historical and color photos. Aligned to Common Core Standards and correlated to state standards. Checkerboard Library is an imprint of Abdo Publishing, a division of ABDO.