The flight — involving thousands of residents from Baghdad and Mosul, in particular — followed an Oct. 31 siege at a church in Baghdad that killed 51 worshipers and 2 priests and a subsequent series of bombings and assassinations singling out Christians. This new exodus, which is not the first, highlights the continuing displacement of Iraqis despite improved security over all and the near-resolution of the political impasse that gripped the country after elections in March.