Well even the north koreans got the centrifuges from pakistan in return for north korean missiles to pakistan.
It's a close collaboration between the two. pakistan has the nukes, but needs the missiles, whereas north korea has the missiles and needs the nukes.
pakistano proliferation to iran and libya again was to create a pan islamic super bloc to confront america.
You have to realize that pakistan was the main backer of taliban and al qaeda and that most al qaeda operatives still find refuge in pakistan.
That the same people who were supporting al qaeda and the taliban, only 3 years back are still in govt in pakistan.
you can't really expect them to have undergone an ideological conversion in the aftermath of 911.
They're merely providing lip service to the war on terror to avoid an iraq like invasion of pakistan. they're apprehending the old al qaeda cadres and replacing them with new ones, people western intelligence wouldnt be able to identify.
it is a very treacherous nation. You'd find it behind most of the terror that you see in the world today. Chechen terrorists, al qaeda, indian terrorists, bosnians, taliban etc etc.