Irish-born photographer Marcus Robinson has spent the last five-years of his life documenting one subject: The rebuilding of Ground Zero. Each morning Robinson puts on a hard hat and orange vest, and enters the site. He keeps his camera equipment in a tool box to blend in. Robinson spends his day shooting video, filming time-lapses, painting and drawing the changing landscape at the world's most talked-about construction site. He talks about becoming part of the small community that inhabits Ground Zero every day.