Senator tells Iraqi leaders US won't leave until mission complete

U.S. Sen. Joseph Lieberman told Iraq's prime minister Wednesday that U.S. forces will remain in Iraq until their mission is complete, despite growing unease in Congress about the progress of the conflict here.

"We cannot let extremists and terrorists, a small number, here in Iraq deprive the 27 million Iraqis of what they want which is a better freer life, safer life for themselves and their children" Lieberman said after his meeting with Prime Minister Ibrahim al-Jaafari.

The Connecticut Democrat, a member of the Senate Armed Services Committee, said the cost of success in Iraq would be high "but the cost for America of failure in Iraq would be catastrophic -- for America, for the Iraqi people and I believe for the world."

Lieberman told a group of reporters that he was convinced progress was being made in building a democratic Iraq despite rising U.S. deaths and the continuing insurgency.