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        Sparked by the arrest of Rosa Parks on 1 December 1955, the Montgomery bus boycott was a 13-month mass protest that ended with the U.S. Supreme Court ruling that segregation on public buses is unconstitutional. - 
  
  
        Dwight Eisenhower reelected. - 
  
  
        Hawaii and Alaska added to the United States. - 
  
  
        U.S. sends military advisors to Vietnam. - 
  
  
        Permits the President to impose tariffs based on a recommendation by the U.S. Secretary of Commerce. - 
  
  
        John F. Kennedy, the 35th president of the United States, was assassinated on Friday, November 22, 1963, at 12:30 p.m. CST in Dallas, Texas, while riding in a presidential motorcade through Dealey Plaza. - 
  
  
        Lyndon B. Johnson. - 
  
  
        All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside. - 
  
  
        Prohibits racial discrimination in voting. - 
  
  
        Fatally shot at the Lorraine Motel. - 
  
  
        Richard Nixon. - 
  
  
        Bars the states and the federal government from setting a voting age higher than eighteen. - 
  
  
        Designed to guarantee equal legal rights for all American citizens regardless of sex. - 
  
  
        Richard Nixon reelected. - 
  
  
        The U.S withdraws from Vietnam. - 
  
  
        Richard Nixon resigns.