Five years after 9/11, Osama bin Laden -- the man said to be behind this horrific act of terrorism -- is still at large.
Not only has the Al Qaeda leader avoided capture, he routinely sends out video and audio tapes exhorting jihad against US interests and warning of more terrorist strikes.
Most reports indicate that the world's most wanted man is hiding in the tribal areas on the Pakistan-Afghanistan border. Some, however, say he could be hiding in a Pakistani city like Karachi or Peshawar, while others say he could be in Africa.
Where is Osama? Why hasn't he been caught yet?
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