Updated

Atop the tallest man-made hill on the eastern seaboard, hundreds of FBI agents, experts and volunteers sift through the World Trade Center debris, looking for any piece of evidence.

For six days, a round-the-clock parade of heavy-duty dump trucks loaded with wreckage and flatbed trailers carrying twisted steel beams has crossed the Verrazano Bridge, turned off Route 440 and chugged up the incline to the Fresh Kills landfill on Staten Island.

``It's the ideal site to sift through the material,'' Kevin Farrell, the city's sanitation commissioner, said Tuesday.