A train filled with atomic devices threatens to destroy the city of Denver. John Serger (an NTSB agent) has to prevent this from happeningA train filled with atomic devices threatens to destroy the city of Denver. John Serger (an NTSB agent) has to prevent this from happeningA train filled with atomic devices threatens to destroy the city of Denver. John Serger (an NTSB agent) has to prevent this from happening