Few people know al Qaeda and its former leader Osama Bin Laden quite like Jack Cloonan.

Radio host Steve Leser interviewed Cloonan, the senior case agent in the FBI Bin Laden Squad, on Blog Talk Radio.

Five years before the Sept. 11 terrorist attacks, Cloonan was working on intelligence about the terrorist group.

Cloonan conceded that authorities underestimated the extent of al Qaeda’s funding and support.

To listen to the full episode click here.