Dragon Fire by William S. Cohen
Upon the assassination of the Secretary of Defence, former senator and Vietnam POW, Michael Patrick Santini, is called upon by his President to fill the vacancy. Once there, he discovers that the United States is under attack by a silent, sinister force, someone determined to alienate our allies and undermine our position as a global superpower. But America is hours away from going to war-with the wrong enemy. Rejecting direct orders from the president, Santini races across the world in a desperate attempt to prevent a catastrophic global war.