The story of how a young Donald Trump started his real-estate business in 1970s and '80s New York with the helping hand of infamous lawyer Roy M. Cohn.The story of how a young Donald Trump started his real-estate business in 1970s and '80s New York with the helping hand of infamous lawyer Roy M. Cohn.The story of how a young Donald Trump started his real-estate business in 1970s and '80s New York with the helping hand of infamous lawyer Roy M. Cohn.