Bush Tries to Avert Turkish Incursion into Iraq.

"Bush is going to have to offer something," said Bulent Aliriza, an expert on Turkey at the Center for Strategic and International Studies in Washington. "This is an unusual situation. Most of the time, these meetings are very carefully choreographed ahead of time."

But Aliriza said an attempt by U.S. Secretary of State Condoleezza Rice to lay the groundwork for the meeting during a weekend trip to Istanbul appeared to do little to satisfy Ankara's demands for concrete steps.

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