On the evening of 5 June 1983, the four members of U2 walked out onto the rain-lashed stage at Red Rocks Amphitheatre in Colorado to perform a set that would become immortalised in rock history.
The band had first set eyes on this natural amphitheatre, situated between sandstone cliffs in the Rocky Mountains, back in the spring of 1981, when they were on their first US tour promoting their debut album Boy.
