Artist Judy Baca created the mural The Great Wall of Los Angeles over five summers (between 1974 and 1983) with four hundred collaborators from the Social and Public Art Resource Center (SPARC), an organization she cofounded that is made up of youth, artists, and community members. Running along the walls of the Tujunga Wash, a tributary of the Los Angeles River in North Hollywood, the mural is half a mile long and features the erased history of local communities. With a grant from the Mellon Foundation, Baca and SPARC are now expanding The Great Wall’s chronology. These “sites of public memory,” as they are described by Baca, are visual records of our authentic historical narrative. The new sections are being painted indoors, as opposed to on site, thanks to innovative mural processes and technologies. Baca and I discussed Generation on Fire, a new segment of the wall that focuses on the ’60s.