Ironworkers hung from tall cranes and cut the buildings down, one reporter said, “like trees.” Structural engineers worked to reinforce the giant concrete “bathtub” that formed the two-by-four-block foundation of the buildings and protected it from flooding by the Hudson River. The work was so dangerous that many firefighters and police officers wrote their names and phone numbers on their forearms in case they fell into the hole or were crushed.ĭid you know? Fires continued to burn in lower Manhattan for 99 days after the attack.Įventually, the pile stabilized enough that construction crews could start using excavators and other heavy equipment. Jagged, sharp pieces of iron and steel were everywhere. Meanwhile, huge fires continued to burn at the center of the pile. The fallen buildings were unstable, and engineers worried that the weight of trucks and cranes would cause the wreckage to shift and collapse again, so the workers had to keep using the bucket brigades. After that, the Ground Zero workers had a new and more heartbreaking mission: to sift carefully through the debris in search of human remains. By September 12, workers had rescued all of the people who were trapped at the site. Unfortunately, there were not many survivors to find: Two firemen were pulled from their truck in a cavity beneath some wreckage, and a few people were pinned at the edges of the pile. An aerial view of Ground Zero after the September 11 attacks on the World Trade Center in New York City.
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