He spent more than two years in Iraq reporting on the Coalition occupation, the relationship between Americans and Iraqis, the development of postwar Iraqi religious and political movements, inter-ethnic and sectarian relations, and the Iraqi civil war. He has regularly contributed to leading periodicals, such as Atlantic Monthly, the Washington Post, the New York Times Magazine, the Boston Review, and Harper’s. He contributed to the footage of Iraq in Charles Ferguson’s documentary No End In Sight and was also interviewed for the film. Rosen has written extensively against the surge in Iraq, notably in a March 2008 article for Rolling Stone.