You may have read reprehensor's hint to Thomas-Scott Gordon's affadavit on the demolition of the WTC. Thomas-Scott Gordon mentions (in not too friendly a context) one certain Kurt Sonnenfeld, who he suspected to be following him arround (accompanied by one Jim Chestnut) on behalf of the FBI.

That name rang a bell. Because some more Info about that same Sonnenfeld I found here:

Kurt Sonnenfeld - FEMA's WhistleBlower?" (at http://signs-of-the-times.org/)

According to the story, Sonnenfeld now is in Argentina (read link to find out the bizarre details). In an interview with Argentine daily newspaper El Pais on September 10th 2006 he is supposed to have said (about his work as a photographer for FEMA on Ground Zero, during the "remove the rubble" cleanup operation)::

"I was the only person, with camera in hand, with total and absolute access to any area of Ground Zero and the WTC. Any other cameras that were within that area would have been confiscated and the the (sic!) person carrying them arrested. [....] What I saw at certain moments and in certain places...is very frightening, I don't know who (sic!) to put it in words, what I saw leads me to the terrible conclusion that there was foreknowledge of what was going to happen."