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The
Beatles, a "British Pop Musical group," received an extortion
threat while they were performing in Denver, Colorado
on August 26, 1964. They were directed to cancel their
appearance or grenades would be thrown at the group. (During
this time, John Lennon, was the subject of an immigration
appeal.) In addition, various "Beatles" references are
made within several FBIHQ main files concerning other
subject matters.
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