9/11 SIT REPFive years afterhttp://www.nytimes.com/2006/09/11/nyregion/nyregionspecial3/11groundzero.htmlFive years after Sept. 11, 2001, ground zero remains a 16-acre, 70-foot-deep hole in the heart of Lower Manhattan. High above it, a scaffolded bank building, contaminated during the attack, hulks like a metal skeleton, waiting endlessly to be razed.The wreck that still stands tall and the pit