Duy Linh Tu. Duy Linh Tu is a journalist and documentary filmmaker, focusing on education, science, and social justice. His work has appeared in print, online, on television, and in theaters. He is also the author of Narrative Storytelling for Multimedia Journalists (Focal Press). Duy is a professor at the Columbia University Graduate School of Journalism, where he teaches reporting and video storytelling courses. He is also a graduate of the program.