Ambassador to the United Nations Adlai Stevenson delivers a speech for United Nations Day at the Dallas Memorial Auditorium. Following the address, he is met outside by a crowd of right-wing activists and is hit on the head with a placard denouncing the UN.

Image of Protestors during U.N. Ambassador Adlai Stevenson’s visit to Dallas. Bill Winfrey Collection, The Dallas Morning News/The Sixth Floor Museum at Dealey Plaza