A counterterrorism specialist is assigned by the President to track down a terrorist who is suspected of planning to set off a nuclear device in the U.S.A counterterrorism specialist is assigned by the President to track down a terrorist who is suspected of planning to set off a nuclear device in the U.S.A counterterrorism specialist is assigned by the President to track down a terrorist who is suspected of planning to set off a nuclear device in the U.S.