Egon Zippel's 9/11 Footage shows the total collapse of the South Tower from West Street. The South Tower (2 WTC) of the World Trade Center was struck by United Airlines Flight 175 at 9:03 a.m. on 9/11, impacting floors 77-85, and collapsed at 9:59 a.m., 56 minutes later, due to the extreme heat from burning jet fuel and office contents weakening its steel structure, leading to progressive collapse and massive casualties, with only a few survivors escaping from above the impact zone. The structur
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