UN Inspectors Visit Heavy Water Plant in Arak, Iran

Linked to Iran's nuclear program

U.N. inspectors visited an Iranian plant on Sunday linked to a planned heavy-water reactor that could yield nuclear bomb fuel, taking up an initial offer by Tehran to open its disputed nuclear program to greater scrutiny.

The increased transparency is the result of a thaw in relations between Iran and the West that culminated in a deal struck last month under which Tehran is to curb its nuclear program in return for some easing of sanctions.