He said "too many sectarian wounds" are "unhealed" and there are "unresolved" disputes -- like the territorial fight between Arabs, Kurds, and Turkomens around Kirkuk.
CNN: STORY HIGHLIGHTS
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There are also the Turkomens, stay-behinds from the days when Mosul was the capital of one of the three Ottoman vilayets (administrative regions) that were crudely lumped together to form Iraq when the Turkish empire collapsed after the first world war.