In this Thursday, Oct. 4, 2012 photo, an Egyptian man inspects a mural with Arabic that reads "God, give me justice," inside an art exhibition for street graffiti in Cairo, Egypt. Graff

 

              In this Thursday, Oct. 4, 2012 photo, an Egyptian man inspects a mural with Arabic that reads "God, give me justice," inside an art exhibition for street graffiti in Cairo, Egypt. Graff
In this Thursday, Oct. 4, 2012 photo, an Egyptian man inspects a mural with Arabic that reads "God, give me justice," inside an art exhibition for street graffiti in 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)