April 21 marked the 42nd annual festival celebrating Chicano Park’s “international recognition as a major public art site for its commanding mural paintings of the past and present struggle of Mexican and Chicano history.” It’s hard to believe that what was once “street art”– which is to say, graffiti– littering the off ramps and the trestles of a bridge now is part of what has become one of San Diego’s cultural landmarks and more, one of our National Historic Monuments.