Los Angeles was once the mural capital of the world, but in 2002, art on the walls of private property was made illegal by an ordinance designed to limit commercial signs, including billboards. Since then, some 400 murals have been painted over. A few weeks ago, we spoke with the graffiti artist known as Saber, who paid sky-writers to post the words, "End the Mural Moratorium: Art is Not a Crime" in the air above City Hall. He's part of an effort to restore a historic tradition. Now, City Councilman Jose Huizar has introduced a new ordinance protecting both existing murals and what are now defined as "original works of art."