Bob Marley, Mick Jagger and Peter Tosh pose backstage at a Rolling Stones concert at the Palladium in New York, United States, 19th June 1978Photography by Michael Putland, Courtesy of Getty Images UKHanging out with a laid-back and loved-up John and Yoko on the Imagine shoot; standing inches away from Mick Jagger as he enthralled an audience of thousands; capturing the instant that Pete Townsend launched his electric guitar six-feet into the air or the time Jerry Hall joined Brian Ferry for an impromptu duet on stage. These are moments that mere mortals dream of, the witnessing of one alone enough to fuel a lifet...