are you telling me that you're not reading the caption... it's from the FEMA website, click the links, and read the captions

[Arlington, VA, September 21, 2001 -- Some of the work done on the back side of the Pentagon is shown. Photo by Jocelyn Augustino/ FEMA News Photo]

not explicitly saying the back side of the crash but it's pretty clear it's the back side of the Pentagon.

BTW other than minor details, what is your explanation that it's not blatant lies and that this is not proof the gov't did it