Just response to war on terror
It is still uncertain and unclear how the success of the decade-long war on terrorism should be defined. There is, however, little progress toward the stated objectives of the war. The accomplishments (if any) from US perspective may be cited as the removal of the "repressive" regimes in Afghanistan and Iraq, and the introduction of new constitutions and elections as well as some developmental work.
But signs of sustainable stability can barely be seen in Afghanistan and even Iraq.
America's presence in strategically important areas and its success in legitimizing the extended role and scope of NATO can be counted as another accomplishment for Washington. In addition, it is hoped that Al-Qaida will grow weaker after the killing of Osama bin Laden (and a good part of Al-Qaida leadership). The success, by and large, in controlling the agenda and the narratives in the media and intellectual circles, too, could be a satisfying factor for the US and its allies.