By any chance, is the guy on the right holding a Geiger counter? It looks like it could be one to me. It seems to have a cord coming from the top probe-like part in the guy's hand. This is best seen if you go to 3:16 here and blow up to full screen size. The thing doesn't look like any ordinary tool or flashlight, to me. I did a google image search for Geiger counters and didn't see anything like this, but that doesn't rule it out. It doesn't look like a respirator-- certainly not like the ones guys in the other pics are wearing.
Here is a close-up view of the item:
If it IS a Geiger counter, this could be incredible proof of radiation at Ground Zero.
Interestingly, boot scrubbing was NOT a unusual thing as shown by this pic:
UPDATE: This EPA article describes washing stations for GZ workers, and has a pic similar to the washing station in the top pic. But it's not exactly clear from the piece why they need to scrub boots so thoroughly. It's a bit bizarre.
UPDATE 2: While I can't say for sure that the guy is holding a Geiger counter (it still looks roughly like one with possibly some photo alteration to mask its full form-- there looks like some funny business in the blow up), on the other hand, it may be unlikely that anyone would blatantly measure radiation at ground zero like this. Any measurements would likely have been done more surreptitiously so as to not get people talking.