U.S. presence in Iraq essential to fighting Islamic State - U.S. official

The United States is the "tip of the spear" in the fight against Islamic State and it would be difficult for the U.S.-led coalition combating the group to be based in Iraq without an American presence, a State Department official said on Friday.

David Schenker, assistant secretary for the State Department's Bureau of Near Eastern Affairs, also told a news briefing in the United Arab Emirates that the United States would not accept any preconditions from Iran to engage in talks.

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