A very interesting clip from a news broadcast on the day.
The reporter describes hearing underground explosions at WTC7, whilst the twin towers were still standing. This ties in with Barry Jennings' testimony of explosions in WTC7, which caused him to be trapped in the building prior to either tower collapsing.

http://www.youtube.com/watch?v=07hJhmiWZSY

Until recently many members of the 'truth movement' were guilty of speculating wildly as to the identity of this guy (nicknamed 'the harley guy').

From the recent appearance of this extended video clip, we know him to be Mark Walsh, and is apparently a freelancer for FOX.

Personally I'd love to know where he was getting his information from when he casually states ...
"... mainly due to structural failure because the fires were just too intense."

If anyone knows him, or can track him down, it would be really interesting to get him to comment.
We don't need to accuse anyone of being an insider. Potentially, as a freelancer for FOX, he could have been briefed on what to say without being part of a conspiracy.