John P. O'Neill Sr. The Man Who Knew
When the Twin Towers fell on Sept. 11, 2001, among the thousands killed
was the one man who may have known more about Osama bin Laden and Al Qaeda
than any other person in America John O'Neill.

The former head of the FBI's flagship antiterrorism unit in New York City,
O'Neill had investigated the bombings of the U.S. embassies in Africa and
the USS Cole in Yemen. For five years, he led the fight to track down and
prosecute al Qaeda operatives throughout the world. But his James Bond style
and obsession with Osama bin Laden made him a controversial figure inside
the buttoned-down world of the FBI. Just two weeks before Sept. 11, O'Neill
left the bureau for a job in the private sector -- as head of security at
the World Trade Center. He died there after rushing back into the burning
towers to aid in the rescue efforts.