Book excerpt: This is a unique history that covers the complete life of the Twin Towers: the sky-high hopes during their planning and construction, the years during which they stood at the pinnacle of the Manhattan skyline, their symbolic meaning to the city, the nation, and the world-and, in a new chapter written for this edition, their heartbreaking demise on September 11, 2001. The New York Times bestseller-now with photographs and a new updated chapter.