A seven-mile-wide space rock is hurtling toward Earth, threatening to obliterate the planet. Now, it’s up to the president of the United States to save the world. He appoints a tough-as-nails veteran astronaut to lead a joint American-Russian crew into space to destroy the comet before impact. Meanwhile, an enterprising reporter uses her smarts to uncover the scoop of the century.
When a train carrying atomic warheads mysteriously crashes in the former Soviet Union, a nuclear specialist discovers the accident is really part of a plot to cover up the theft of the weapons. Assigned to help her recover the missing bombs is a crack Special Forces Colonel.