美国总统特朗普5月20日宣布了耗资约1750亿美元、名为“金穹”的导弹防御系统的概念。他预计该系统将在其任期结束前全面运行。
美国防部多年来一直警告，需要更新针对中俄先进导弹的对策。“金穹”在设想中具备陆基和天基能力，能够在发射前、助推段、中段和末段四个阶段拦截导弹。该计划重点专注在导弹早期或途中予以拦截。
此前国防部制定了中、高、超高成本三种计划，其差异取决于购买的卫星、传感器和天基拦截器的数量。美国国会预算办公室本月估计，仅“金穹”计划天基部分在未来20年将耗资高达5420亿美元。目前尚不清楚特朗普的最终选择以及成本如何估计。
（美联社，CNN）
BY 竹新社
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