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Ground Zero, New York City, N.Y. (Sept. 17, 2001) — An aerial view shows only a small portion of the crime scene where the World Trade Center collapsed following the Sept. 11 terrorist attack (Credit: US Navy / Chief Photographer Mate Eric J Tilford)

Ground Zero, New York City, N.Y. (Sept. 17, 2001) -- An aerial view shows only a small portion of the crime scene where the World Trade Center collapsed following the Sept. 11 terrorist attack (Credit: US Navy / Chief Photographer Mate Eric J Tilford)