Today would've been John Lennon's 72nd birthday. As a teenager in Liverpool, Lennon and friend Paul McCartney began writing and performing together. Early on, they formed The Quarrymen, which would ultimately become the biggest rock 'n roll group of all time The Beatles. After the Fab Four split in 1970, Lennon continued songwriting and performing. John Lennon was shot and killed outside his apartment on December 8, 1980 in a senseless act of violence...silencing one of the most iconic voices in rock 'n roll history.