In highly unusual testimony inside the federal supermax prison, a former operative for Al Qaeda has described prominent members of Saudi Arabia’s royal family as major donors to the terrorist network in the late 1990s and claimed that he discussed a plan to shoot down Air Force One with a Stinger missile with a staff member at the Saudi Embassy in Washington.
The allegations from Mr. Moussaoui come at a sensitive time in Saudi-American relations, less than two weeks after the death of the country’s longtime monarch, King Abdullah, and the succession of a half-brother, King Salman.
There has often been tension between Saudi leaders and the Obama administration since the Arab uprisings of 2011 and the efforts to manage the region’s resulting turmoil. Mr. Moussaoui describes meeting in Saudi Arabia with Salman, then a prince, and other Saudi royals while delivering them letters from Osama bin Laden.
There has long been evidence that wealthy Saudis provided support for bin Laden, the son of a Saudi construction magnate, and Al Qaeda before the 2001 attacks. Saudi Arabia had worked closely with the United States to finance Islamic militants fighting the Soviet Army in Afghanistan in the 1980s, and Al Qaeda drew its members from those militant fighters.
He said in the prison deposition that he was directed in 1998 or 1999 by Qaeda leaders in Afghanistan to create a digital database of donors to the group. Among those he said he recalled listing in the database were Prince Turki al-Faisal, then the Saudi intelligence chief; Prince Bandar Bin Sultan, the longtime Saudi ambassador to the United States; Prince al-Waleed bin Talal, a prominent billionaire investor; and many of the country’s leading clerics.