美国能源部的科学家们正不声不响地研究一种潜在的核弹头以用于弹道导弹防御武器。在劳伦斯·利弗莫尔国家试验室指导研究的官员们把这一工作说成是60年代斯普林特(Sprint)和斯帕坦(Spartan)防御系统早期研究的发展。像上述计划那样,今天的计划集中在装有核弹的地空导弹上,这种导弹将能在苏联导弹接近美国目标的末段拦截苏联的核 US Department of Energy scientists are quietly studying a potential nuclear warhead for ballistic missile defense. Officials led by Lawrence Livermore National Laboratory described the work as an evolution of early research on the defensive systems of Sprint and Spartan in the 1960s. Like the above plan, today’s plan focuses on surface-to-air missiles equipped with nuclear bombs that will intercept the Soviet nuclei at the very end of the Soviet missile near the United States target