A profile of two engineers who designed eight bridges in the city and its environs between 1904 and 1964. While Gustav Lindenthal, whose Williamsburg Bridge across the East River opened in 1904, dreamed of spanning the Hudson, it was his protégé Othmar Ammann who did, in 1931, with the George Washington Bridge. Three years later, The New Yorker rhapsodized: "It's a pity he can't live for another 100 years because then he could build a bridge across the ocean." That didn't happen, but his final bridge, the Verrazano Narrows, is 60 feet longer than the Golden Gate. Stacy Keach narrates.