Article Photos: Preserving Egypt's revolutionary graffiti 2/11

  FILE - In this Thursday, May 24, 2012 file photo, a political activist paints a mural on a wall in Tahrir Square in central 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/Pete Muller, File)