A dizzying view of Manhattan in the 1960s, the tallest town in the world, and the men who work cloud-high to keep it growing. They are the Mohawk Indians from Kahnawake, near Montréal, famed for their skill in erecting the steel frames of skyscrapers. The film shows their nimble work, high above the pavement, but there are also glimpses of the quieter community life of the old Kahnawake Reserve.

• Documentary