Vampire War: Fallout

Fallout is the fourth in the Vampire War series. A few months following the conclusion of the previous installment, Dark Nation, the DSA task force has reclaimed the White House and a portion of Washington, D. C. Meanwhile, the new Vampire Master has taken over the city of New Orleans and its outlying areas. They've set up operations in an old school with a plan to destroy Washington and the surviving members of the task force with a nuclear weapon.
With more research, the tsak force discovers a possible method for finally ending the war and eliminating the vampire threat forever.