[Blimp flying over Perisphere and Trylon.]

[Blimp flying over the New York World's Fair site.]

[Construction of the Helicline, Trylon and Perisphere, New York World's Fair site.]

[New York World's Fair. Pile driver with Perisphere and Trylon in background. Construction view.]

[Construction of the Trylon and Perisphere, New York World's Fair site.]

[Construction of the Trylon and Perisphere, New York World's Fair site.]

[Construction of the Perisphere and Trylon, New York World's Fair site.]

New York Worlds Fair. Perisphere and Trylon steel frame

[Construction of the Trylon and Perisphere at the New York World's Fair site.]

[Construction of the Trylon and Perisphere at the New York World's Fair site.]

[Construction of the Perisphere, New York World's Fair site.]

New York Worlds Fair. Perisphere and Trylon steel frame

[Construction of the Trylon and Perisphere, New York World's Fair site.]

[Construction of the Trylon and Perisphere at the New York World's Fair site.]

[Construction of the Perisphere, New York World's Fair site.]

[Construction of the Perisphere, New York World's Fair site.]

[New York World's Fair. Motor police officer in front of New York City Building. Construction view. (With the Trylon and Perisphere in the background.).]

[Construction of the Trylon, Perisphere and Helicline at the New York World's Fair site.]

[Construction of the Trylon and Perisphere, New York World's Fair site.]

[New York World's Fair. Theme Center, Perisphere and Trylon. Double exposure.]