DAVID MCNEW / GETTY IMAGES
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A crowd watches as astronaut Dr. Buzz Aldrin, who walked on the moon on July 20, 1969, and members of the Hualapai tribe and other VIPs take the first walk on the Skywalk.
A crowd watches as astronaut Dr. Buzz Aldrin, who walked on the moon on July 20, 1969, and members of the Hualapai tribe and other VIPs take the first walk on the Skywalk.