@cicerone imposter,
A no-fly zone is not a n0-crawl, no-walk, no-march, no-run, or no-drive zone.
Saddam was requested by the USA to eliminate AQ from Iraq. Saddam chose not to respond to that request. If he had responded and had said he would satisfy that request if he were permitted to fly into the northeastern Iraq part of the no-fly zone to remove those AQ, he would have been granted that permission by the USA, UK and France.
The US has frequently gone into Pakistan per requests by the Pakistan government (e.g., USA drones).