In this lesson, students learn about the engineering concept of learning from failure by examining the collapse of the World Trade Center Twin Towers. They also learn about the science and mathematics behind the collapse of these structures, as well as the societal implications. Students examine opposing arguments regarding the towers’ collapse, looking at the scientific explanations of how the impact of the jets brought about the collapse of the Twin Towers. Another important component of this lesson is that engineers learn from failure, and the failure of structures may actually provide an opportunity for expanding knowledge about structural materials and engineering design. We recommend reading Chapter 3, which is included in this book selection and provides a module overview and summary. A materials list, safety notes, standards, assessment, teacher background information, Internet resources, and references are provided. This book selection also includes the Table of Contents, About the Editors and Authors, Acknowledgments, Appendix, and Index.