Desc: Walls of Fire: Directed by Herbert Kline, Edmund Penney. With Ricardo Montalban, Jose Clemente Orozco, Diego Rivera, David Alfaro Siqueiros. Narrated by Ricardo Montalbán, this documentary examines the history of Mexican murals and their artists. Among the works examined are those by José Clemente Orozco, Diego Rivera and David Alfaro Siqueiros.