About 60 truckloads of debris that could contain tiny fragments of bone or tissue were unearthed by construction crews that have been working on the new World Trade Center in recent years. That material is now being transported to a park built on top of the former Fresh Kills landfill on Staten Island, where investigators will attempt to find any possible remains during the next 10 weeks, the city said. That's the material the two potential human remains were found in.