"Michael Scheuer, who once headed the CIA's bin Laden unit, says bin Laden has been given permission by a young cleric in Saudi Arabia authorizing al Qaeda to "use nuclear weapons against the United States ... capping the casualties at 10 million."

"He's had an approval, a religious approval for 10 million deaths?" I asked him.

"Yes," Scheuer responded."

http://www.cnn.com/2006/WORLD/asiapcf/08/22/amanpour.binladen/index.html