Artist Murad Subai and The Walls Remember campaign

Artist Murad Subai paints a picture of a disappeared political figure next to a defaced picture he previously painted, as part of "The Walls Remember" campaign he has launched to put focus on people who have disappeared in what is known as the "forced disappearance," in Sanaa September 27, 2012. (Khaled Abdullah/Reuters)

Artist Murad Subai paints a picture of a disappeared political figure next to a defaced picture he previously painted, as part of “The Walls Remember” campaign he has launched to put focus on people who have disappeared in what is known as the “forced disappearance,” in Sanaa September 27, 2012. (Khaled Abdullah/Reuters)