Osama bin Laden now has religious approval to use a nuclear device against Americans, says the former head of the CIA unit charged with tracking down the Saudi terrorist. The former agent, Michael Scheuer, speaks to Steve Kroft in his first television interview without disguise to be broadcast on 60 MINUTES Sunday, Nov. 14 (7:00-8:00 PM, ET/PT) on the CBS Television Network....

Even if bin Laden had a nuclear weapon, he probably wouldn't have used it for a lack of proper religious authority - authority he has now. "[Bin Laden] secured from a Saudi sheik...a rather long treatise on the possibility of using nuclear weapons against the Americans," says Scheuer. "[The treatise] found that he was perfectly within his rights to use them. Muslims argue that the United States is responsible for millions of dead Muslims around the world, so reciprocity would mean you could kill millions of Americans," Scheuer tells Kroft.

Scheuer says bin Laden was criticized by some Muslims for the 9/11 attack because he killed so many people without enough warning and before offering to help convert them to Islam. But now bin Laden has addressed the American people and given fair warning. "They're intention is to end the war as soon as they can and to ratchet up the pain for the Americans until we get out of their region....If they acquire the weapon, they will use it, whether it's chemical, biological or some sort of nuclear weapon," says Scheuer.