Photograph of Harry S. Truman and Lyndon Johnson seated together. Johnson holds some papers and is seated between a recording device, a cowboy hat, and scattered papers. The face of a man is partially visible to the right.

Photograph of Lady Bird Johnson looking towards the partially off camera Jacqueline Onassis Kennedy. They are standing in a room that contains a doorway with floral curtains, an unadorned wall with a doorway, and a partially visible mirror and lamp. A person leans over behind Johnson and touches a bag.

Photograph of Lyndon Johnson and John F. Kennedy standing and reading letters amid a room full of people.

Photograph of Lyndon Johnson and John F. Kennedy standing in a room and surrounded by photographers.

Photograph of Lyndon Johnson and John F. Kennedy standing in a room and surrounded by photographers.

Photograph of Mr. and Mrs. Otto Lindig standing outside of a building with a group of people who are singing and holding open books.

Photograph of Otto Lindig shaking hands with a man wearing a suit. Lindig's wife and a several rows of young people stand behind them. The entire group is standing outside in front of a white building.

Image of an aerial view of the Convention Center construction site for the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Aerial photograph of Matthews Ranch (Lambshead) headquarters. In the foreground are several ranch buildings, including the bunkhouse and a house with chimneys on either end. Further up from these buildings and across an open dirt area are other buildings, including a corral, stables, and barn, beside which several trucks are parked. Above these buildings is a triangle-shaped area created by fences. At the top of the photograph is open ranch land dotted with vegetation.

Image of an aerial view of the construction site for the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Image of an aerial view of the construction site for the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Image of an aerial view of the construction site for the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Image of an aerial view of the construction site for the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Image of an aerial view of the construction site for the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Image of aerial view of the construction site for the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Image of an aerial view of the HemisFair construction site for the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Image of an aerial view of the construction site for the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Image of an aerial view of the construction site for the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Image of an aerial view of the construction site for the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Image of an aerial view of the construction site of the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Image of an aerial view of the construction site for the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Image of an aerial view of the construction site and Convention Center for the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Photograph of a woman with a portrait of the two men sitting in front of her. She has curly brown brown hair, wears a striped blouse, and is sitting on a wooden chair. The portrait in front of her is slightly different from the two men sitting in front of her as the colors of their jackets have been swapped. The man on the left, Watt Matthews, is depicted as wearing a tan jacket and the bespectacled man on the right, Joe B. Matthews, is wearing a red jacket.

Image of area near Arena construction site for the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.