Melissa Cacciola's photo series "Skywalkers: The Legacy of the Mohawk Ironworker at the World Trade Center" consists of thirty portraits of Mohawk ironworkers from the Kahnawake reservation in Canada who have been working at the World Trade Center site in the aftermath of 9/11.

Using the old photographic process called tintype, gave these portraits an interesting vintage look:

Using the historic process of the tintype (a photographic positive on a lacquered metal plate, invented during the 1850s), Cacciola created individual portraits of each ironworker using a large format camera, period brass lenses, and hand-made film emulsions. Some of the earliest known tintypes in existence are of Native American subjects giving further relevance to the use of this nineteenth-century process.

Read the WSJ piece to find out more about the men's personal stories.

Featured image: Joe, 2012.