Photos: Building the twin towers

Ground was broken for the World Trade Center in August 1966. In 1967, the site was cleared for the twin towers alongside the Hudson River in Lower Manhattan. The first tenants of One World Trade Center, the north tower, moved in in late 1970.

Ground was broken for the World Trade Center in August 1966. In 1967, the site was cleared for the twin towers alongside the Hudson River in Lower Manhattan. The first tenants of One World Trade Center, the north tower, moved in in late 1970.