In 1974 French high-wire artist Philippe Petit walked a tightrope strung between the twin towers of New York’s World Trade Center. Petit walked between the two towers eight times. (One of my fav picture books is about a French high wire artist.
Innovative in both design and construction, the towers of the World Trade Center are built in immense pre-assembled pieces, each three stories tall, dramatically speeding the construction process; April two years before the buildings are dedicated
World Trade Center, 1970 - Photos - The Twin Towers through the years