question: Where is Khalid's ethnic lineage traced back to? answer: His ethnic lineage was traced to the pashtuns paragraph: By early 1999, al Qaeda was already a potent adversary of the United States.  Bin Laden and his chief of operations, Abu Hafs al Masri, also known as Mohammed Atef, occupied undisputed leadership positions atop al Qaeda's organizational structure. Within this structure, al Qaeda's worldwide terrorist operations relied heavily on the ideas and work of enterprising and strongwilled field commanders who enjoyed considerable autonomy. To understand how the organization actually worked and to introduce the origins of the 9/11 plot, we briefly examine three of these subordinate commanders: Khalid Sheikh Mohammed (KSM), Riduan Isamuddin (better known as Hambali), and Abd al Rahim al Nashiri. We will devote the most attention to Khalid Sheikh Mohammed, the chief manager of the "planes operation." Khalid Sheikh Mohammed No one exemplifies the model of the terrorist entrepreneur more clearly than Khalid Sheikh Mohammed, the principal architect of the 9/11 attacks. KSM followed a rather tortuous path to his eventual membership in al Qaeda. Highly educated and equally comfortable in a government office or a terrorist safehouse, KSM applied his imagination, technical aptitude, and managerial skills to hatching and planning an extraordinary array of terrorist schemes. These ideas included conventional car bombing, political assassination, aircraft bombing, hijacking, reservoir poisoning, and, ultimately, the use of aircraft as missiles guided by suicide operatives. Like his nephew Ramzi Yousef (three years KSM's junior), KSM grew up in Kuwait but traces his ethnic lineage to the Baluchistan region straddling Iran and Pakistan. Raised in a religious family, KSM claims to have joined the Muslim Brotherhood at age 16 and to have become enamored of violent jihad at youth camps in the desert. In 1983, following his graduation from secondary school, KSM left Kuwait to enroll at Chowan College, a small Baptist school in Murfreesboro, North Carolina. After a semester at Chowan, KSM transferred to North Carolina Agricultural and Technical State University in Greensboro, which he attended with Yousef 's brother, another future al Qaeda member. KSM earned a degree in mechanical engineering in December 1986. Although he apparently did not attract attention for extreme Islamist beliefs or activities while in the United States, KSM plunged into the anti-Soviet Afghan jihad soon after graduating from college. Visiting Pakistan for the first time in early 1987, he traveled to Peshawar, where his brother Zahid introduced him to the famous Afghan mujahid Abdul Rasul Sayyaf, head of the Hizbul- Ittihad El-Islami (Islamic Union Party). Sayyaf became KSM's mentor and provided KSM with military training at Sayyaf 's Sada camp. KSM claims he then fought the Soviets and remained at the front for three months before being summoned to perform administrative duties for Abdullah Azzam. 