Keywords: Kennedy, John F. ; Johnson, Lyndon B. ; Kennedy, John F ; Johnson, Lyndon B ; Civil rights movements History ; 20th century ; United States ; Civil rights movements Sources ; History ; 20th century ; United States ; African Americans Civil rights ; History ; 20th century ; African Americans Sources ; Civil rights ; History ; 20th century ; Civil rights movements United States ; History ; 20th century ; Civil rights movements United States ; History ; 20th century ; Sources ; African Americans Civil rights ; History ; 20th century ; African Americans Civil rights ; History ; 20th century ; Sources ; United States Politics and government ; 1961-1963 ; United States Sources ; Politics and government ; 1961-1963 ; United States Politics and government ; 1963-1969 ; United States Sources ; Politics and government ; 1963-1969 ; United States Politics and government ; 1961-1963 ; United States Politics and government ; 1961-1963 ; Sources ; United States Politics and government ; 1963-1969 ; United States Politics and government ; 1963-1969 ; Sources ; Quelle ; Quelle ; USA ; Bürgerrechtsbewegung ; Schwarze ; USA ; Bürgerrechtsbewegung ; Kennedy, John F. 1917-1963 ; Sozialpolitik ; Johnson, Lyndon B. 1908-1973 ; Sozialpolitik ; Kennedy, John F. 1917-1963 ; Johnson, Lyndon B. 1908-1973 ; Menschenrecht ; Bürgerrechtsbewegung ; Schwarze ; Rassenpolitik