Iran's President Mahmoud Ahmadinejad speaks in front of a picture of late revolutionary founder Ayatollah Khomeini at his mausoleum during a ceremony marking the 18th anniversary of Khomeini's death just outside of Tehran, Iran on June 3, 2007. Ahmadinejad vowed that Iran would not back down to the West with their nuclear program. (UPI Photo/Mohammad Kheirkhah)