Image of Mrs. Johnson, Henry B. Gonzales, and Mayor Walter W. McAllister with group at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Image of NIOSA, Night In Old San Antonio, at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Image of Office of American States at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas.

Image of monorail car fire and fireman at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas.

Illustration of the Mormon Pavilion at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas.

Image of Mrs. Johnson at an interview at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Image of the Panama Pavillion at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas.

Image of the Pearl Pavilion at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas. The sign reads "The Pavilion Pearl Lager Beer."

Image of the Pearl Pavilion at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas. The sign reads "The Pavilion Pearl Lager Beer."

Image of “Old Shoe” amusement rider- 2 children at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio.

Aerial view of a model of the United States Pavilion at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas.

Aerial view of a model of the Women's Pavilion at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas.

Image of the Monorail at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas.

Image of the Monorail at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas.

Image of monorail car fire at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas.

Image of monorail car fire and fireman at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas.

An artistic illustration of the United States Confluence Theater, one of two pavilions of the United States at HemisFair '68. It is a 70 foot high structure which had the largest curvilinear motion picture screen in the world. The Francis Thompson film, "Confluence, U.S.A." was shown in the theatre during the fair.

Illustration of the US Exhibit Pavilion at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas.

Image of a model of the Southwestern Bell Telephone Co. Pavilion at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas.

Image of a model of the Texas Pavilion with fountain at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas.

Image of the Gulf Insurance Group Building and Tower at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas.

A color photograph of a three-dimensional model of the HemisFair '68 grounds. The most prominent building shown is the Tower of the Americas, which includes an observation deck and revolving restaurant at the top. A portion of the 10,500 seat arena is visible to the left. Also visible is a part of the lake at Fiesta Island, along with lagoon boats on some of the waterways.

Illustration of building and outside scenery at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas.

Illustration of the Alamo and San Antonio at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas.