Saddam's 'friendly and peaceful' (per the American far-Left) Iraqi yellowcake was discovered by US troops after the 2003 US invasion of Iraq.  Yellowcake is a form of processed uranium ore that can be used to make nuclear weapons.

According to the AP:

"The last major remnant of Saddam Hussein's nuclear program — a huge stockpile of concentrated uranium — reached a Canadian port Saturday to complete a secret U.S. operation that included a two-week airlift from Baghdad and a ship voyage crossing two oceans.  The removal of 550 metric tons of "yellowcake" — the seed material for higher-grade nuclear enrichment — was a significant step toward closing the books on Saddam's nuclear legacy. It also brought relief to U.S. and Iraqi authorities who had worried the cache would reach insurgents or smugglers crossing to Iran to aid its nuclear ambitions."

http://www.msnbc.msn.com/id/25546334

http://www.france24.com/en/20080707-iraq-sells-uranium-canada-iraq&navi=MONDE