Interesting photo of odd-coloured smoke.

[scubadiver]

I have seen the footage from which this picture came from.

It is odd-coloured smoke compared to the rest of the collapse...

I suppose it could be innocent enough!

[Jay Ref]

So you've never seen shadows before??

-z

[scubadiver]

Again, resorting to personal insults!

Wouldn't you think this smoke

(a) has a different source purely because it looks different to the pulverizing concrete (wispy as opposed to cauliflower?)

(b) it is a totally different colour. If that was dust from the concrete, the smoke would be a lot greyer than that.

[Johnny Pixels]

I think the smoke appears to be out of the shadow of the tower, unlike the majority, so this affects its colour somewhat.

I also think that maybe the smoke could be dirt or dust from the area around the base of the WTC.

I finally also think that while it may be interesting, it's not suspicious.