Deep Black: Dark Zone

Description for DEEP BLACK:  DARK ZONE by Stephen Coonts and Jim DeFelice:

DEEP BLACK; THE MOST SECRET ARM OF THE MOST SECRET U.S. INTELLIGENCE AGENCY.

The mission seems routine: go to London, meet someone in a park, obtain a list of computers that are being used secretly by terrorists to pass messages. But just as Deep Black operatives Charlie Dean and Tommy Karr are about to meet their contact, a sniper guns the stranger down.
A Deep Black investigation begins. Former Delta Force trooper, Lia DeFrancesca. a sexy ass-kicking woman and Dean's only weakness, gets called it to help, but the investigation doesn't get into high gear until the murder is found to be connected to the disappearance of a French atomic warhead. Soon it becomes apparent that what was thought to be an elaborate plan by terrorists to blow up the Eiffel Tower is only a diversionary plan for the real target: the Channel Tunnel. A nuclear warhead going off in the tunnel will trigger a catastrophe that will wipe out the coasts of France and England, killing hundreds of thousands.
It is up to Deep Black to expose the plot and thwart the terrorists' plans. This is Deep Black's most dangerous mission yet. It will require all their talents and all their teamwork to make sure that things go right and that justice is served.

This is #3 in Deep Black Series.