Under siege. Stephen Coonts. 1991.

Under Siege captures a chilling nightmare scenario, one that has already devastated Colombia and sent shock waves around the world. In a novel as immediate a tomorrow's headlines, the war against the drug lords has escalated to an unexpected, stunning climax. Washington DC, the heart of the US government, is a city ‘under siege’ held hostage by a foreign army ruling the streets.

Now the US military must do battle against the most deadly challenge ever to threaten America. Admiral Jake Grafton, working with the Joint Chiefs of Staff is assigned to hunt down an assassin on a cataclysmic mission: to eliminate the President and his entire cabinet, and plunge the United States into chaos.