| 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 |