The United Nations charter gives every nation the right to self defence, therefore when the American embassies were bombed it was a matter of time before the Americans responded by going for what they suspected were the causes of the attack.
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In 1988, when democracy was restored, the military establishment was still very powerful. The extremist groups were still there. And when the aid and assistance to Pakistan was cut, we had to adopt harsh economic policies. So in a way, it showed that democracy doesn't pay, and the military was able to reassert itself.