In simple terms foreign policy of a nation may be taken as the objectives that the government of a nation aims to achieve abroad, the values on which they are founded, and the measures employed to achieve these goals (Wittkopf & McCormick, 2004). The values and interests on which the U.S. foreign policy has based for more than the two centuries of its existence have been peace and prosperity, stability and security, and democracy and defence. The objectives inherent in the foreign policy that the U.S. governments have sought to achieve throughout its history, according to Wittkopf, Jones and Kegley 2008, p. 29, are “freedom from the dictates of others, commercial advantage, and promotion of American ideas and ideals are among the persistent foreign policy goals tied to these values and interests”. There have been swings between isolationism and internationalism by the U.S. in pursuit of these objectives of the foreign policy (Wittkopf, Jones & Kegley 2008). The 9/11 attack by elements of the Al-Qaeda, who had found a haven in the Taliban controlled Afghanistan resulted in America along with its allies overthrowing the Taliban, an example of the more internationalism posture in the current American foreign policy. However, this neither ended the presence of Al-Qaeda in Afghanistan, nor the Taliban, who withdrew to safe havens to conduct a war of terrorism against the elected Afghan government and the military forces of America and its allies (Armitage, Berger & Markey, 2010).