UN sanctioned military action can only happen with the approval of the UN Security Council. I seriously hope that the United States would veto such an action. If not, that could be pretty funny.
"And the USA has voted YES to allow the UN to invade the USA!"
Then there's the tens of millions of armed Americans nationwide...
With talk of Bill Clinton vying for the Koffi Annan's general secretary job, do we have any doubts Clinton (either bill OR hillary) would support such a UN "peacekeeping " invasion?