The regime gave plenty of support to musicians willing to write and sing anti-U.S. or pro-revolution songs; this was quite a bonus in an era when many of the traditional musicians found it difficult or impossible to earn a living. In 1967, the "Casa de las Américas" in Havana held a "Festival de la canción de protesta" (protest songs). Tania Castellanos, a filín singer and author, wrote "¡Por Ángela!" in support of Angela Davis. César Portillo de la Luz wrote "Oh, valeroso Viet Nam".