Ghost Train — Dick Stivers

The massacre had all the markings of a random terrorist hit--the arrival lounge at LAX was littered with bodies. But there had only been one real target, and now the federal agent was dead. Her death is tied to a mission that takes Able Team across the American Midwest, riding shotgun on a speeding locomotive that officially doesn't exist. Their job is simple: ensure safe delivery of its cargo or this will be the ghost train's--and Able Team's--final run!