"Since DESERT FOX, we've had over 70 no-fly zone violations with well over 100 Iraqi aircraft involved, and there's been almost 20 incidents of missile firings at our planes, AAA firings and radar illuminations in that same period of time.

What we're seeing now is an increase in frequency, intensity, [and] coordination of their entire air defense system against our planes flying in both the north and the south.

We are seeing, for example, almost three times the number of surface-to-air missile batteries in the southern area, and movement of these surface-to-air missile batteries on occasion, which obviously makes it more difficult for our flyers to know where they are and where the threat may be posed.

You all know, I believe, that the anti-air defense system is composed not only of aircraft, fighters that would come down and engage planes, but also the surface-to-air missiles, AAA batteries, radars, early warning means, and communications. It's evident to us that this entire system has been centrally controlled and turned on to oppose our enforcement of the no-fly zone sanctions, both north and south.

http://www.defenselink.mil/transcripts/1999/t01251999_t0125znn.html