I'm not disputing the estimated numbers, I'm saying Fox used a photo that wasn't taken that day, and tried to pass it off as coming from that rally.
"There’s another problem with the photograph: It doesn’t include the National Museum of the American Indian, a building located at the corner of Fourth Street and Independence Avenue that opened on Sept. 14, 2004. (Looking at the photograph, the building should be in the upper right hand corner of the National Mall, next to the Air and Space Museum.) That means the picture was taken before the museum opened exactly five years ago. So clearly the photo doesn’t show the 'tea party' crowd from the Sept. 12 protest."