The events of September 11, 2001, changed the world forever. With compelling photographs and sensitive, age-appropriate text, this Level 3 reader recounts the shocking attacks at the World Trade Center, the Pentagon, and in Pennsylvania, explains who was behind the attacks, and celebrates the spirit of hope that emerged through the inspiring story of rescue and recovery and the heroes who raced to save lives. National Geographic Readers' combination of expert-vetted text and fascinating images, along with an engaging approach to reading, has proved to be a winning formula with kids, parents, and educators. Level 3 text provides accessible, yet wide-ranging information for fluent readers. Each reader includes text written by an experienced, skilled children's books author, a photo glossary, and interactive features in which kids get to reinforce what they've learned in the book.