Themba Lewis has a great gallery of pictures of street art from the revolution in Egypt on his website. His photos captured an explosion of public art onto the walls and sidewalks of Cairo as the revolution surged through the capital and swept Mubarak’s regime into the Nile. From portraits of martyrs to the participation of Cairo’s sign-painting guild to ominous warnings of the revolution’s betrayal, this is an amazing document of ephemeral visual communiques.