This book discusses the various NASA Centers across the United States, and presents what can be seen at each. Each has a specialty, and each generally has a visitor's center worth visiting. The guide also mentions nearby facilities of interest, such as the Smithsonian's two Air-and-Space Museum facilities. We will cover all of the manned (U.S.) flight hardware still in existence, including some related aircraft such as the X-15 and the Shuttle Carrier Aircraft. Not all of these projects saw flight, but some boiler plate or test models survive. There is more stuff rusting away outside storage buildings at NASA Centers or at Aerospace Contractor's facilities. During work on this book, two additional manned capsules were located.