The Guardians — Richard Austin

Freedom's Last Hope:
Unknown to most American's, there is a plan for the day after. Before the dust of World War III has settled, Project Guardian moves into action. America's secret weapon is a four-man elite survival team, armed with awesome combat skills, equipped with the most devastating personal weaponry ever devised, trained to hair-trigger tautness, and entrusted with freedom's last hope: the top secret Blueprint for Renewal.

First step: get the new President safely out of ravaged Washington, across a thousand miles of chaos, and into the impregnable midwestern fortress known as Heartland.

A tall order, even for a bunch of hardcore heroes.