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. . eo aN . ee ¢ a . . Memorandum to Mr. Rosen on rt Martin Luther king, Jr. . CO . - Reverend Martin Luther King, Jr., prominent integrationist who led bus boycott in Montgomery Alabama. and “sit-in demonstra- tions," has been associated with National Association for the Advancement of Colored*People and Congress of Racial Equality. King has not been investigated hy the Far, . Mf. evy F- £ . “Bureau Ties! weveal: King thanked Socialist Workers Party (cited by Attorney Gencral) for support of bus boycott; attended meetings of Progressive Party (cited by Subcommittee of Senate Judiciary Comnittec); and was honorary chairman é6f Young Socialist League campaign on behalf of victims of racist terror. * ° "King in 1950's mentioned as’ potential victim of assassin- ° ation plot and in_]957_attendedCoumunist Party training school, \|\seninar and reportedly gave closing specck. King President o