The weakening of the international terrorist threat posed by al-Qaeda in recent years should not be regarded as "mission accomplished," nor is the effort to prevent its return complete
2013 marked the twenty-fifth anniversary of the founding of al-Qaeda and twelve years since the September 11, 2001 terror attacks in the United States. Despite the global counterterror campaign conducted against al-Qaeda, the organization and its affiliates are still responsible for the vast majority of terror attacks in the world, which kill and wound thousands of people every year. In addition to their involvement in terrorist attacks, al-Qaeda and its affiliates exert much influence in the international system, far more than their numbers and military power suggest. This memorandum explains how one terrorist organization, which at the height of its activity numbered a few hundred operatives, established a worldwide, highly influential phenomenon called the “global jihad movement” and succeeded, more than any other terrorist organization in modern history, in harming, harassing, and exhausting a hegemonic superpower and its allies and entangling them in bloody and costly military campaigns around the world.
