I almost agreed with draken on this one.
I think it's just "white out". BUT...the bottom photo is the clincher.
Alex Jones does note that the photo's "may" have been doctored.
Originally picked up on by citizens for legitimate Government, we now have further evidence to suggest that the above photo has been doctored.
CLG reported: "At first, (almost) everything looks fine, but look closer... look at the guy with the white hat... check out his left arm (HIS left arm).... the lower of the rails of the railing is IN FRONT of his left arm... where of course it shouldn't be! I'm NO image specialist, but this sure looks ridiculous. I'd say itīs a fake."
The CLG has also inspected this image. "The white-hatted man was apparently superimposed onto the photo. Not only is his arm 'behind' a railing that is supposedly several feet behind HIM, but also, upon magnification in Photoshop, part of the bar actually goes into his head. This was 'touched-up,' but pixels of his head mix unmistakably with pixels from the railing." --Michael Rectenwald.
Here is an enhancement of the picture. You can clearly see that the railing appears IN FRONT of the supposed bomber's left arm. Not only this but there also seems to be a railing running through the man's head.