Throughout history any number of endeavors have been abandoned as hopeless, only to be resurrected and com pleted by the sheer indomitability of the human spirit. The Leaning Tower of Pisa, for example, and San Francisco's Golden Gate Bridge were fraught with setbacks and reverses, but work was eventually completed and the world is now richer for these great feats of engineering. Another example is provided by the Chesapeake and Delaware Canal—a project that was more than two centuries in the making and that is an important part of the heritage of American civil engineering and a lasting tribute to those who refused to abandon it.
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