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

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

[New York World's Fair site under construction, with the frames of the Trylon and Perisphere in the background.]

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

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

[Construction of the New York World's Fair site with the frames of the Trylon and Perisphere in the background.]

[Construction of the New York World's Fair site, with the steel frames of the Trylon and Perisphere in the background.]

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

[New York World's Fair site under construction, with the frames of the Trylon and Perisphere in the background.]

[Patrolman on the New York World's Fair site with the structural frames of the Trylon and Perisphere in the background.]

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

[Construction of the New York World's Fair site, with the steel frames of the Trylon and Perisphere in the background.]

[Construction of Electrical Products building with frame of Trylon in background, New York World's Fair site.]

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

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

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

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

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

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

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