How did the Wright brothers design their first airplane? What did it take to construct San Francisco's famous Golden Gate Bridge? This series gives readers a behind-the-scenes look at some of the most significant engineering achievements in U.S. history. In addition to compelling narrative text, these books feature quotes, diagrams, and high-impact photos that bring each story to life. Additional features include a fast facts spread, a timeline, critical-thinking questions, primary-source quotes and accompanying source notes, a phonetic glossary, an index, and sources for further research.