1996: FBI investigators are prevented from carrying out an investigation into two relatives of bin Laden. The FBI wanted to learn more about Abdullah bin Laden, "because of his relationship with the World Assembly of Muslim Youth [WAMY] - a suspected terrorist organization." Abdullah was the US director of WAMY and lived with his brother Omar in Falls Church, Virginia, a town just outside Washington. The coding on the document, marked secret, indicates the case involved espionage, murder, and national security. WAMY has its offices at 5613 Leesburg Pike. Remarkably, it is later determined that four of the 9/11 hijackers lived at 5913 Leesburg Pike at the same time the two bin Laden brothers were there. WAMY has not been put on a list of terrorist organizations in the US, but it has been banned in Pakistan. A high-placed intelligence official tells the Guardian: "there were always constraints on investigating the Saudis. There were particular investigations that were effectively killed." An unnamed US source says to the BBC, "There is a hidden agenda at the very highest levels of our government." [BBC Newsnight, 11/6/01, Guardian, 11/7/01]