That effort has run into repeated difficulties, most recently over Iran's announced intention to resume uranium conversion and enrichment in defiance of European warnings.

On the other hand, the Tehran government has not unilaterally resumed uranium conversion or enrichment.

He had many individual parts - ranging from transformer sheets to uranium conversion -supplied by small West German firms, using a network of agents to this end.

Iran defied an agreement with Germany, France and Britain last month and resumed the uranium conversion.

Nuclear components, including equipment for uranium conversion, are still missing, the atomic energy agency said, while large stockpiles of uranium remain in Iraq.

Uranium mining and milling, uranium conversion and enrichment, and nuclear weapons testing have all occurred on reservation lands in the past century.

And Iran's resumption of work related to uranium conversion eliminates the only reason for the three European countries not to report Iran to the Security Council.

Sequoyah"s primary business is uranium conversion at its eastern Oklahoma plant.

The Bush administration has not allowed its stated opposition to Iran's uranium conversion at Isfahan to block the Russian offer.

Anyone asking Iran to take conciliatory steps, like suspending its uranium conversion, should recognize that this work is legal under international agreements.