This series uses a then-and-now approach to examine how the September 11, 2001, terrorist attacks shaped US culture, politics, defenses, and more. Each title examines in-depth a 9/11-related subject, comparing the way things were before, during, and immediately following the attacks to how things are now, two decades later. Aligned to Common Core Standards and correlated to state standards. Abdo & Daughters is an imprint of Abdo Publishing, a division of ABDO.