"In this Thursday, Oct. 4, 2012 photo, Egyptian girls walk past a mural inspired by a widely circulated photo of Egyptian police beating and stripping a veiled female protester, on a recently whitewashed wall with Arabic that reads ""we will not forget you our lady,"" in Tahrir Square, Cairo, Egypt. Graffiti has been among the most powerful art forms and tools of Egypt's revolution and the turbulent months since, but it also has proven to be its most vulnerable and ephemeral. So a group of artists, photographers and a publisher joined hands to preserve the images. ""Wall Talk"" _ their newly released, 680-page book _ collects hundreds of photos of graffiti dating from the Jan. 25, 2011 eruption of the revolt against then-President Hosni Mubarak until today. (AP Photo/Nasser Nasser, File)"
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