Product Description: It fell from the sky as it re-entered Earth's atmosphere. The Columbia space shuttle is a sight that will never be forgotten. What caused this national tragedy? How did it change the future of space flight? Learn the risks and challenges that come with exploring our final frontier...read more

Product Description: Please Note: This product not designed to be used as a print book. Please be aware that any print version of the book does not contain many of the important materials and features of the product. Specifically, the e-book version contains numerous links to exemplars and outside sources of additional information that are not included in the print version...read more