When this was being debated on photography blogs, someone dug up the originally published version of Hansen's photo, published just the day after the event. He

When this was being debated on photography blogs, someone dug up the originally published version of Hansen's photo, published just the day after the event. Here's a side-by-side: http://www.flickr.com/photos/gunthert/8485283411/sizes/o/in/photostream/ http://www.flickr.com/photos/gunthert/8485283411/sizes/o/in/... . While the earlier version could also have been edited (quickly) before publication, there's no doubt that it had much more believable lighting and coloration. For the WPP submission, Hansen desaturated the photo globally, particularly the blue and yellow. He also locally edited the luminance of the left wall to be consistent with the right. The effect of both changes was to isolate the marcher's angry red faces as the primary point of interest.