Why is the F.B.I. blocking Freedom of Information Requests?

A Saudi family with ties to one of the Saudi princes fled their Florida home a few weeks prior to 9-11-2001. They left three cars, food in the fridge, and toys in the pool. They had had visitors. One was the man who flew the plane that crashed in Pennsylvania on 9-11. Two others were the men who flew the planes into the twin towers of the World Trade Center on 9-11. Go here to read about the efforts to learn more about this Saudi family.