Hillel Cohen is Research Fellow at the Harry S. Truman Institute for the Advancement of Peace at the Hebrew University of Jerusalem. He is the author of "Army of Shadows: Palestinian Collaborators with Zionism 1917-1948 "(UC Press), "The Present Absentees: Palestinian Refugees in Israel since 1948, "and "The Marketplace is Empty: The Rise and Fall of Arab Jerusalem 1967-2007".