美国空军少校克罗斯(杜夫朗格饰)被徵召去保护总统随身携带的黑色手提箱---美国洲际飞弹卫星遥控电脑。但是没想到在第一天行动,就被一队庸兵劫走,而这群恐怖份子要求美国总统在电视上自裁,否则将把飞弹瞄准华盛顿特区。United States air force Major Frank Cross is in trouble with the "brass" again. This time he's made an unauthorized humanitarian relief flight ... dropping sacks of rice to starving Kurds. To the press, he's a hero. The Pentagon would like to court martial him, but can't because the President wants the highly photogenic media hero by his side--at least until after the next election. So Cross has a new assignment. He's to carry the "black bag"-- the President's high-tech briefcase containing the "go codes" and communications computer for launching America's nuclear ICBM arsenal in case of national emergency. It should be a piece of cake, but... On his first day on the job, a team of mercenaries steal the briefcase and drop Cross off a tenth floor balcony. Miraculously, he not only survives, but pursues the terrorists in a hijacked taxi. The ensuing car chase careens through the alleyways and streets of Chicago, up the ramps of a parking garage and then, unexpectedly, continues over the...
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