可以说，美国总统精准把握了时机，选择在美日就关税问题展开谈判的前夕打出这一牌，显然是以关税作为筹码，诱使石破茂同意为美国开发反导系统。美 国政府可能会以撤销额外25%的关税作为"奖励"，给予石破茂一个"礼品"。至于其他关税问题，恐怕只能等到未来再继续讨论。日本是否能继续获得关税豁 免，也取决于石破茂能为美国提供多少"好处"。 然而，美国总统的关税政策不仅仅局限于经济领域，它还带有强烈的战略意图。在与盟友进行博弈时，美国往往将一些条件超越了关税范畴。例如，要求盟 友支持美国在国际事务中的立场，尤其是在对抗中国问题上，以此作为换取关税减免的交换条件。当前，美国又拿出了这一"王牌"，通过施压日本，迫使 其"掏钱"参与战略合作。据《环球时报》报道，美国总统与日本首相石破茂近日通话时，讨论了双方合作开发新一代导弹防御系统"金穹"计划的相关事宜。 "金穹"系统是美国为保护本土安全而计划打造的反导系统，是美国总统的一个重要"面子工程"。尽管系统是否能确保美国的绝对安全仍然是个未知数，但其 最大特点之一就是"烧钱"——预计投入资金至少为1750亿美元。美国曾与加拿大讨论过合作，但最终未能达成协议。如今，美国又把目光转向了日本 ...

新华社北京5月22日电美国总统特朗普20日发布了名为"金穹"的天基导弹防御系统的发展规划，称该系统计划在3年内"全面运转"。多方质疑这个 所谓的"金穹"计划公然提出大幅增加外空作战手段，将加剧外空战场化和军备竞赛风险。 何为"金穹"？ 天基导弹防御系统是建立于太空轨道的导弹防御系统，其概念早在冷战时期便已提出，并落地为里根时期的"星球大战"计划。尽管"星球大战"计 划早已因技术原因被放弃，但特朗普今年1月上台一周后便签署行政令要求建造美国"铁穹"防御系统，美国防部2月将其更名为"金穹"，有媒体称 之为"星球大战2.0"计划。 该计划的核心是建立一个由数千颗小型卫星组成的卫星群，这些卫星主要包括导弹探测卫星和导弹摧毁卫星，前者负责定位导弹和载具，后者负 责拦截并摧毁导弹。 特朗普说，"金穹"将与美国现有的导弹防御能力整合，一旦完全建成，将能拦截从世界其他地方甚至太空发射的导弹，整个系统将耗资约1750亿 美元，其中首笔250亿美元启动资金将在国会审议中的下一财年预算里安排。他还表示，希望在其任期结束前完成该工程。 简言之，所谓"金穹"计划，旨在构建不受任何约束的全球性、多层次、多领域导弹防御系统。该计划公然提出 ...

Core Points - The U.S. President Trump announced the development plan for the "Iron Dome" missile defense system, aiming for it to be fully operational within three years [1][2] - The "Iron Dome" system will integrate with existing U.S. missile defense capabilities and is designed to intercept missiles launched from around the world, including space [2][4] Group 1: System Overview - The space-based missile defense system is intended to consist of thousands of small satellites, including missile detection and destruction satellites [4] - The current U.S. missile defense systems target mainly ballistic missiles, categorized by range: short-range (≤1000 km), medium-range (1000-3500 km), long-range (3500-5500 km), and intercontinental ballistic missiles (>5500 km) [7][10] Group 2: Budget and Feasibility Concerns - The estimated cost for the "Iron Dome" system is approximately $175 billion, with initial funding of $25 billion proposed for the next fiscal year's budget [17][19] - The Congressional Budget Office estimates the total cost could reach up to $542 billion, raising concerns about the project's financial feasibility [19] Group 3: Technical Challenges - Achieving full operational capability for the "Iron Dome" system within three years is considered technically challenging, with significant funding and time required for system testing and technology development [13][16] - The concept of a space-based missile defense system has historical roots in the Cold War, previously attempted under the "Star Wars" program, which was abandoned due to technical limitations [22] Group 4: Geopolitical Implications - The introduction of the "Iron Dome" system may exacerbate geopolitical tensions and lead to a new arms race, similar to the historical context of the "Star Wars" initiative [22][24] - Analysts warn that the system could create greater threats and potentially trigger a military competition not seen since the Cold War [24] Group 5: Military-Industrial Complex - The "Iron Dome" project is viewed as a significant opportunity for defense contractors, with expectations of unlimited spending on this super project [27] - There are concerns that the initiative may serve as a means for political and financial gain for certain U.S. politicians and military-industrial entities [25][29]