Fisk

A guy who has actually met bin Laden:

So why only on audio? Why no video tape? Is he sick? Yes, say the usual American "intelligence sources". It's the same old story: Osama bin Laden talks to us from the mouth of a cave, from within a cave, from a basement perhaps, from a tape almost certainly recorded down a telephone line from far away. Yesterday's message, broadcast as ever by al-Jazeera television, was a reminder that security - not sickness - decides his method of communication.

All here. Someone was speculating that he may have changed his appearance.