[Claeren]

Yahoo News:

The U.S. move on the F-16s came after Islamabad said last week it was considering greater cooperation with the U.N.'s International Atomic Energy Agency in its investigation of Iran's nuclear program.

Diplomats familiar with the U.N. investigation said this month Pakistan had agreed to hand over centrifuge components so U.N. inspectors could compare them with machinery sold to Iran by Abdul Qadeer Khan, father of Pakistan's atomic bomb program.