Nightwatch — Richard P. Henrick

On an isolated highway in the Crimea, as the President of the United States races toward a top secret nuclear summit, high-powered weaponry suddenly opens fire on the motorcade, brutally slaying America's Chief Executive and those assigned to protect him.
Above the rushing whitewater river in the Missouri Ozarks, a jet-black Huey helicopter appears from nowhere to rain death upon the traveling party of the U.S. Vice President. Only the quick, decisive actions of Special Agent Vice Kellogg of the Secret Service saves the V.P. from sharing the grim fate of the Commander-in-Chief.
Without warning, the greatest nation of Earth has been rendered leaderless. Liberty and democracy have been placed under siege by a well-armed and organized foe … an enemy operating not from outside America's borders, but from within her own sacrosanct halls of power. And now a small handful of patriots must do whatever it takes to prevent America's legacy of freedom from becoming a thing of the past … and stem the tide of treason, nuclear terror, and death originating from the remarkable airborne sentinel called… NIGHTWATCH.