Former FBI's Executive Agent-in-Charge flagship antiterrorism unit in New York City, O'Neill, for five years led the fight to track down and prosecute al Qaeda operatives throughout the world. His 'obsession' with Osama Bin Laden made him a controversial figure, and clearly, he was a man Bin Laden wanted dead -- Just two weeks, prior to the attacks of September 11, 2001, O'Neill left the bureau for a job in the private sector, he had quit because he believed that the Bush administration had stymied the intelligence agency's investigations on terrorism. O'Neill charged that it had done so even as it bargained with the Taliban on handing over of Osama bin Laden in exchange for political recognition and economic aid -- In the ultimate irony, O'Neill had gone public with these charges at the same time that he was leaving the FBI to become the head of security at the World Trade Center, where, on the now infamous day of Tuesday, September 11, 2001, he perished -- According to media reports, John P. O'Neill was in his new 34th-floor office at One World Trade Center when the first hijacked plane crashed into the upper floors of the tower. O'Neill reportedly told the authors of the book 'Hidden Truth', ('Bin Laden: The Forbidden Truth') that the main obstacles to investigate Islamic terrorism were U.S. oil corporate interests, and the role played by Saudi Arabia in it -- O'Neill complained that the U.S. State Department, and behind it the oil lobby who make up President George Walker Bush's entourage, blocked attempts to prove bin Laden's guilt.