Paul McCartney, left, and John Lennon during a November 1963 Beatles show in London. The next month, the band had its first big hit in the U.S. and Beatlemania started to sweep America. AP hide caption

Musician Ravi Shankar performs at the Concert For Bangladesh benefit at Madison Square Garden in New York on Aug. 1, 1971. Shankar died Tuesday. He was 92. JIM WELLS/AP hide caption

Britain released a stamp in 2006 honoring The Beatles. AP hide caption

Nov. 12, 1980: John Lennon (R) and his wife Yoko Ono outside the Dakota Apartments in Manhattan, where he was killed on Dec. 8, 1980. AFP/Getty Images hide caption

Sir George Martin. Courtesy of the artist hide caption