Anyone who has been to my office has seen the above photograph on the kitchen wall. Most of the so-called windwalkers or ironwalkers who build the skyscrapers in Manhattan were Native Americans from the Mohawk tribe. After 9/11 many of these iron workers who had built the World Trade Center towers returned to dismantle them and make the area safe again.
Here and here are a nice English language lessons on these brave people.
And an article from the New York Times