Facundo Cabral, a wide-roving Argentine musician who had been one of Latin America’s most celebrated folk and protest singers, was shot to death July 9 in Guatemala City. He was 74. Mr. Cabral, who had given a concert two days earlier in Quetzaltenango, Guatemala, was en route to the Guatemala City airport when his vehicle was hit by a hail of bullets in an orchestrated attack involving three carloads of gunmen, the Associated Press reported.