Amnesty International needed to collect 500,000 signatures on a petition to close Guantanamo Bay. This site allows people to tear down the prison themselves. When you sign an online petition, you receive a pixel from a photograph of Guantanamo. Your name appears where your pixel was. The photograph constantly evolves into a mural of names. A Facebook application allows people to use their pixel as an icon. Without advertising support, the site has collected 124,218 names. It has been so successful that it has been expanded internationally in eight different languages.