123Movies. Organized by Paul McCartney and the United Nations, these concerts were in response to the 1975-79 Khmer Rouge’s reign, where three million persons perished in Cambodia. During the concerts, McCartney brought three generations of popular musicians together. The older generation included McCartney and the Wings, The Who and members of Procol Harum. The middle generation was represented by Queen and members of Led Zeppelin. Most notably, there was the new generation of mainly New Wavers and Punk Rockers, such as The Pretenders, Elvis Costello and The Attractions, Ian Dury and the Blockheads, The Clash, and The Specials.