His youngest brother, Khalid Shaikh Mohammed, who was later to play a senior role in al Qaeda's leadership arrived in 1987.
According to the 9/11 Commission, 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).The USA sought Zahid for questioning about whether he played a role in the 1993 World Trade Center bombing.
[8] On September 26, 2001, shortly after al Qaeda's 2001 attacks on the World Trade Center, The Guardian published a report on their investigation as to whether there was evidence of a real link between Osama bin Laden and Mercy International, the charity Zahid helped run.
[5] American intelligence analysts alleged that Zahid was the director of the Jelazee Refugee Camp and Lajnat Al-Da'wa al Islamia (LDI) in Pakistan.
[6][5] American intelligence analysts told Hamad's hearing that "other sources" identified Zahid as holding extremist views.