Personnel at Ground Zero tie back and reinforce

Personnel at Ground Zero tie back and reinforce the exposed slurry wall on March 15, 2002. It was a 3-foot-thick, 6 story high, below-ground, concrete structure surrounding the World Trade Center, designed to keep its basement levels from being flooded by the Hudson River. New York City. (BSLOC_2015_2_123)

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21st Century 9 11 9-11 Act Of War Aftermath Al Qaeda Al-qaeda Basement Building Collapse Extremist Ground Zero Islamic Extremism Jihad Lcgr1507 New York City Rebuilding Recovery Sept 11 Skyscraper Terrorism Terrorist Twin Towers World Trade Center

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