Peace lines

The Times (UK) has obtained access, it's not clear how, to the US military's sectarian map of Baghdad. It's here. Of particular interest is that the areas mapped "turning Shia" are mostly east of the Tigris, and those "turning Sunni" are west of the river. Coupled with a possible plan to declare that quelling "sectarian" violence is an Iraqi and not a US responsibility, the lines of a partitioned city are being drawn.