The US will have to choose between its wife and its girlfriend. Will it be Turkey or Iraqi Kurdistan? Meantime, Iran is hanging around the back door. That's a crude metaphor that fits all too well with 100,000 Turkish troops on the Iraqi border in an already violent region. At stake are: stability in the only tranquil part of Iraq; US relations with a NATO ally; and the global price of crude oil. Secretary of State Condoleezza Rice is on her way to Istanbul for a conference originally called to talk about Iraq's internal security; Iraqi Prime Minister Maliki has asked Iran to help resolve the crisis; Turkey's President will meet President Bush on Monday. Can they calm an escalating crisis?