The Devil's Light by Richard North Patterson

The Devil's Light: A Novel - Led by Osama bin Laden, Al Qaeda is able to steal a nuclear bomb.  Bin Laden is planning an attack on 9/11/11.  Brooke Chanler, CIA agent believes he knows how the bomb was stolen and where it will be used.

This book was written before almost 2 years before the actual dates the events are set. Therefore, events that happened in that time are not accounted for, such as bin Ladens death May 2011.