It's a bit more vague than that. There is a UN resolution (691, I think) concerning protection of the Kurds. The US decided it would take a no-fly zone to enforce it. Iraq has never agreed to it. It was NOT a part of the cease fire.
So we say we're supporting UN resolutions, and Iraq says we are not. Personally, I don't give a tinker's damn about UN resolutions - we have a cease fire with Iraq, and should be able to do anything we please...
Truth may be vague (yet I think "pursuant to UN resolution" is close enough fit to real situation here). But I find it interesting that *NPR* today was saying what this guy was accusing Freepers of saying.
As usual, the Freepers are more on target than the press.