俄新型核武亮相，西方反导系统可能“报废”？

Core Viewpoint - Russia has successfully tested two new nuclear weapons, the "Zircon" nuclear-powered cruise missile and the "Poseidon" nuclear-powered unmanned underwater vehicle, raising concerns in the West about the effectiveness of their missile defense systems [1][3]. Group 1: "Zircon" Nuclear-Powered Cruise Missile - The "Zircon" missile is approximately 12 meters long and can carry a nuclear warhead with a yield of 50 kilotons, capable of long-duration flight [1]. - It can fly nearly 30,000 kilometers without interruption due to its nuclear power, operating at a low altitude of 25 to 100 meters to evade enemy air defense systems [3]. - The missile's potential flight path includes a low-altitude route over the Arctic, crossing the Atlantic, and ultimately reaching the North American west coast [3]. Group 2: "Poseidon" Nuclear-Powered Underwater Vehicle - The "Poseidon" is about 20 meters long and weighs around 100 tons, powered by a liquid metal-cooled reactor, capable of operating at depths of up to 1,000 meters and traveling over 10,000 kilometers [4]. - It is designed to be launched from a nuclear submarine and can autonomously conduct long-range attacks, potentially creating underwater nuclear explosions to devastate coastal infrastructure [4][6]. - The "Poseidon" can carry a nuclear warhead with a yield of up to 1 megaton, sufficient to destroy military ports and ships, and disrupt commercial shipping for an extended period [6]. - Due to its underwater capabilities, existing land-based and space-based missile defense systems are ineffective against the "Poseidon," leading to concerns about a new arms race in underwater defense [6].