Bin Laden has nuclear weapons?
The Russians sold them cheap.
Let's face it.
They WERE our enemy.
The KGB got together with some military weapons dealers and sold some surplus to the rebels.
Some would do it just for spite, not to mention the MONEY.
I wouldn't doubt a few Pakistani ISI operatives managed to funnel some of these weapons to Bin Laden. Oh, and let's not forget Iran and Iraq..and I wouldn't put it past a Saudi relative of his.
Hell, there's plenty to go around!