"We destroyed a lot of chemical weapons, " says Duelfer of the U.N. inspection team.

CNN: What Saddam's got

In February, U.N. weapons inspectors "found nothing untoward" at an ammunition filling plant close to where the troops have found the mobile labs, a U.N. inspection team spokesman said Monday.

CNN: U.S.: Mobile labs found in Iraq

It undid the U.N. inspection regime of the 1990s.

CENTERFORSECURITYPOLICY: Remarks to the Council on Foreign Relations

After a U.N. inspection team had verified this attack and brought back horrific videotapes of the injured Iranians, arms control specialists were miffed that their benign assumptions had been so crudely disproved by Saddam.

CENTERFORSECURITYPOLICY: Why Bush Is Right to Reject a Defective B.W.C. Protocol

U.N. weapons inspection chief Hans Blix said his inspectors never found evidence of such labs.

CNN: U.S.: Mobile labs found in Iraq

But several U.S. allies say there should be a renewed U.N. weapons inspection effort before any military action.

CNN: Cheney: Saddam working on nuclear weapons

The U.S. hopes the threat will "hold Saddam Hussein's feet to the fire" on compliance with U.N. requirements for inspection and monitoring of Iraq's weapons program.

CNN: AllPolitics - U.S. Officials Stand Firm Against Iraq