jon nato is wrapping up operation necessary lib yarks officially ending the seven-month campaign which eventually led to the downfall of moammar qaddafi. david piper is in tripoli, streaming live. david. >> reporter: jon, yes, nato's secretary general, and degrees rasmussen, in tripoli, said he was proud in what role nato played in getting rid of qaddafi. they conducted 20,000sortes and hit 70,000 targets. the nato chief says they fulfilled their mandate now, for the national transitional council had asked that nato carry on its mission until december, because they feared that qaddafi loyalists could still create incidents here. but, of course, it has been seen as a success. but there has been criticism from countries like china and also, russia, over extending its mandate. they d. in fact, protect these revolutionary fighters, allowing them to build up their forces and,