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Title:A Bailey bridge-turned-ramp descends into the Ground Zero crater, enabling personnel, machinery and materials to enter and leave the work area.
Description:NY, March 15, 2002 -- A Bailey bridge-turned-ramp descends into the Ground Zero crater, enabling personnel, machinery and materials to enter and leave the work area. The structure, spanning more than 500 feet, is a sectional-type bridge invented in 1940 a
Photographer:Rieger, Michael

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