The International Atomic Energy Agency's (IAEA) Board of Governors voted unanimously to close the Agency's investigation into Iran's alleged past nuclear weapons work on December 15.  That investigation concluded that Iran had a coordinated nuclear-weapons related program until 2003 and that some weapons-related activities continued through 2009.  The closure of the investigation keeps Iran on track to receive large-scale sanctions relief as part of the nuclear accord reached with six world powers in July.