But the Oct. 1 meeting may simply set the stage for the US to seek tougher sanctions against Tehran for its nuclear program.
Funding for war in Afghanistan will eclipse Iraq for the first time in next year's budget.
War effort requires farmers, engineers, lawyers to share expertise.
President Obama had hoped to pressure Iran by building international consensus on tougher sanctions.
Iran does have enough fuel to, in theory, make a nuclear bomb. But that's been public knowledge since February.
The US won't call the military ouster of the country's president a "coup." But it says elections scheduled for November would be illegitimate.
The US, France, Germany, Britain, China, and Russia meet this week to discuss potential further punishment.