转自：北京日报客户端 新华社莫斯科/圣彼得堡12月21日电2025年10月最后一周，俄罗斯总统普京在两次公开活动中巧妙透露 俄最新研发的"海燕"核动力巡航导弹、"波塞冬"核动力无人潜航器测试消息。面对俄核威慑力量的升 级，美国总统特朗普要求五角大楼立即"对等"启动核武器试验。 当前，俄乌和谈进展缓慢，俄美之间仅存的军控条约《新削减战略武器条约》将于2026年2月到期，"海 燕"和"波塞冬"可成为俄方在军控等问题上的重要筹码。西方普遍将"海燕"与"波塞冬"界定为用于核报 复的二次打击武器，并非核武器的迭代升级，主要作用是政治筹码和心理威慑。 这是11月 10日在俄罗斯首都莫斯科拍摄的克里姆林宫。新华社发（亚历山大摄） 高调官宣 主管核试验的美国能源部长赖特则在第一时间"灭火"，称特朗普下令恢复的核试验将不包括核爆炸。 5月9日， 在俄罗斯首都莫斯科，军人参加纪念苏联伟大卫国战争胜利80周年阅兵式。新华社记者赖向东摄 以矛攻盾 俄官方称，"海燕"因装备核动力发动机，理论上可实现无限射程，发射后可长时间在空中待命，从任一 方向发动攻击，飞行时速在850至1300公里，可在50至100米超低空飞行。 据俄媒报道，"波 ...

Group 1 - The core strategy of the U.S. tariff policy is to use high tariffs as leverage against specific countries, effectively pressuring them into concessions without incurring actual costs [1][2] - The U.S. has threatened to raise tariffs on all steel and aluminum products to 50%, causing significant concern in Japan, a key ally that heavily relies on U.S. security [1][2] - Japan's trade representative, Akizawa Ryo, expressed strong dissatisfaction with the U.S. decision and urged a reconsideration, indicating a shift in Japan's stance during upcoming negotiations [2][6] Group 2 - The U.S. has previously imposed a 25% tariff on steel and aluminum from Japan, which faced intense opposition, and the new 50% tariff threat is seen as a tactic to gain leverage in negotiations [2][6] - The U.S. is using tariffs not only as economic tools but also as strategic instruments to compel allies to support its positions in international matters, particularly regarding China [2][4] - Discussions between U.S. President and Japanese Prime Minister Shigeru Ishiba included collaboration on the "Iron Dome" missile defense system, which is part of a broader strategy to secure financial contributions from Japan [4][6] Group 3 - The "Iron Dome" system is a significant project for U.S. national security, with an estimated investment of at least $175 billion, and Japan is considering contributing to its development [4][6] - Japan's potential financial support for the U.S. missile defense system may be aimed at securing concessions on tariffs, reflecting a complex interplay of economic and security interests [4][6] - The outcome of the tariff negotiations will likely depend on the extent of Japan's contributions to U.S. defense initiatives, indicating a transactional nature of the U.S.-Japan relationship [6]

Group 1 - The core point of the article is that U.S. President Trump stated that if Canada remains separate from the U.S., joining the "Iron Dome" system would cost 61 billion Canadian dollars [1] Group 2 - The financial implication of Canada joining the "Iron Dome" system is significant, with a stated cost of 61 billion CAD [1]

Core Viewpoint - The "Gold Dome" missile defense system proposed by President Trump aims to be fully operational within three years, raising concerns about escalating militarization of outer space and potential arms race risks [1][3]. Group 1: System Overview - The "Gold Dome" system is a space-based missile defense initiative, reminiscent of the Cold War-era "Star Wars" program, and is designed to integrate with existing U.S. missile defense capabilities [3]. - The project involves a constellation of thousands of small satellites for missile detection and interception, with an estimated cost of approximately $175 billion, including an initial funding request of $25 billion [3][5]. - The system is characterized as a global, multi-layered missile defense strategy that may violate the principles of the Outer Space Treaty, potentially destabilizing international security [3][13]. Group 2: Political and Financial Implications - The high costs and advanced technologies required for the "Gold Dome" system have raised political concerns regarding funding and the feasibility of achieving Trump's ambitious timeline [5][17]. - Major defense contractors such as L3 Harris Technologies, Lockheed Martin, and Raytheon are expected to be involved in the project, with potential contracts also going to companies linked to Elon Musk [5][17]. - Canada has expressed interest in joining the "Gold Dome" initiative, indicating a willingness to share the financial burden, as the Canadian government perceives a need for protection against potential missile threats from space [7][11]. Group 3: Concerns and Challenges - Experts warn that the development of such a powerful defense system could provoke adversaries to enhance their offensive capabilities, leading to a global arms race [13][17]. - The technical challenges of ensuring comprehensive coverage against all potential threats are significant, with concerns about the cost-effectiveness and efficiency of the proposed system [17][18]. - The estimated total cost of the project could exceed $500 billion over 20 years, raising doubts about its viability within the constraints of the U.S. defense budget [18].

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]