Leon's Fire. Bruce Highland, #7

As a Cold War era military intelligence agent investigating a double homicide, and the disappearance of a nuclear weapon from a major Army munitions depot in Germany, Bruce Highland manages to lose the main suspect. Years later, the main suspect, and the weapon, resurfaces, leading up to an extortion plot to hold a major metropolitan area in the United States hostage in exchange for money. Bruce Highland returns, as a private contractor to the government, to track down the terrorists, in a desperate effort to prevent them from using it to kill hundreds of thousands of people.
Delve inside the minds of psychopaths, and the team of professionals that make a heroic effort to beat them at their own game.