This bright anthem is about U2's transformative first trip to California in the early 1980s. It is one of a number of personal tracks on Songs of Innocence. Bono told Rolling Stone: "The whole album is first journeys - first journeys geographically, spiritually, sexually. And that's hard. But we went there."
Other US-location-named U2 songs include the Pop track "Miami" and the All That You Can't Leave Behind cut "New York."
David Bowie's "Space Oddity" tells the story of an astronaut who cuts off communication and floats into space. The BBC used it extensively in their coverage of the 1969 moon landing - an odd choice considering the lyrics.