Double Blindside (Stonyman) by Don Pendleton

STONY MAN 

Operating undercover at the President's command, the expert soldiers and cyber techs of the Stony Man team fight for freedom and the rights of the innocent, opposing terrorism in all its deadly forms wherever the need arises. 

NUCLEAR JEOPARDY 

The killing of U.S. operatives in Turkey threatens to jeopardize U.S.–Turkish relations. Committed to putting an end to the murder before another agent is assassinated, Phoenix Force heads overseas, only to discover the dead agents are just the beginning. Extremists have stolen nuclear devices and set targets in both Turkey and America. With the countdown to D-day already started, Phoenix Force must race to stop the bombs from detonating in Turkey while Able Team must do whatever it takes to neutralize the threat in the U.S. Failure is simply not an option.