Osama bin Laden, the mastermind behind the Sept. 11 attacks against the United States, is dead, and the U.S. is in possession of his body, a person familiar with the situation said late Sunday.UPDATE 11:13 PM This AP [VIDEO] of President Obama's remarks tonight on the death of Osama Bin Laden
President Barack Obama was expected to address the nation on the developments Sunday night.
A senior U.S. counterterrorism official said bin Laden was killed in a ground operation in Pakistan, not by a Predator drone. The official said it happened last week.
Officials have long believed bin Laden, the most wanted man in the world, was hiding a mountainous region along the Pakistan-Afghanistan border.
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