September 13, 1965…The Beatles released "Yesterday" b/w "Act Naturally" in North America. "Yesterday" was the first recording by the Beatles that relied upon a performance by a single member of the band, namely Paul McCartney. He was accompanied solely by a string quartet. The recording differed so greatly from their usual works that the other three members of the band vetoed the release of the song as a single in the United Kingdom, however it was eventually issued as a single there in 1976.