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The Tunnel to Towers Foundation is a charitable organization founded in tribute to New York Fire Department firefighter Stephen Siller, who was killed on September 11, 2001, during the September 11 attacks. [5]
Frank Siller, Tunnel to Towers Foundation Chairman & CEO, remembers his brother Stephen and shares the mission of Tunnel to Towers Foundation.
Tunnel to Towers began with one runner, Stephen Siller, a valiant firefighter trying to get to the Twin Towers on 9/11 any way he could. Now, tens of thousands travel that same route every year ...
While the towers were square, the interior cores were rectangular and supported by 47 columns that ran the full height of each tower. [22] All the elevators and stairwells were in the core, leaving a large column-free space between it and the perimeter that was bridged by prefabricated floor trusses. [23]
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When the Twin Towers were completed, the total costs to the Port Authority had reached $900 million. [89] The ribbon-cutting ceremony took place on April 4, 1973. [90] In addition to the Twin Towers, the plan for the World Trade Center complex included four other low-rise buildings, which were built in the early 1970s.
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