In 1964, the Beatles swept the world, including Argentina. It didn’t take long before local bands began imitating its sounds, first in English, and eventually in Spanish. But the 1960s and ’70s were also a turbulent time, with military dictatorships — and Argentine rock musicians, inspired by the Beatles, spoke up against the human rights violations taking place. The World’s Lucia Benavides speaks with Argentine musicians from that time period to tell the story of a Latin American rock revolution.