This is generally incorrect in several different ways. ICBMs are not invulnerable after their boost phase and ballistic missile defense continues to improve rap

This is generally incorrect in several different ways. ICBMs are not invulnerable after their boost phase and ballistic missile defense continues to improve rapidly. The U.S. operates a small number of mid-course interceptors as part of the GMD system[1] to defend against small scale attacks from states such as North Korea. The low number of interceptors does not upset the balance of power with any larger nuclear states but that may change in the near future. The U.S. has been pursuing a new kill vehicle for its interceptors to replace the current EKV[2]. The MOKV was based on an earlier program to put multiple kill vehicles on a single rocket[3]. This would allow for a single rocket to potentially intercept up to 6 incoming warheads. What's more, this interceptor could be fitted to the SM-3 anti-ballistic missile missile used by the navy, massively increasing the total number of possible interceptors. Hypersonic missiles do not follow a predictable trajectory and fly much lower than ballistic missiles making their detection and engagement extremely difficult. Detection is actually the larger of the two issues. From the time a nuclear armed hypersonic missile is detected to the time it impacts could be fewer than 5 minutes. Far far less than the ~30 minutes of warning you get for ballistic missiles. This timeframe is too short for a proper chain of command and massively increases the risk of mistakes being made. It also incentivizes first strikes. Unfortunately, any nation that does not have this capability is at a massive disadvantage when confronted by a nation that does. Even if not used for nuclear strikes, hypersonics have the ability to destroy key, heavily defended targets with essentially no notice. This will likely make them extremely important for future engagements, especially naval ones. The U.S. has a large and very well defended navy which is key to its military strategy. China and Russia's focus on hypersonics is no coincidence. [1]https://en.wikipedia.org/wiki/Ground-Based_Midcourse_Defense https://en.wikipedia.org/wiki/Ground-Based_Midcourse_Defense [2]https://en.wikipedia.org/wiki/Exoatmospheric_Kill_Vehicle https://en.wikipedia.org/wiki/Exoatmospheric_Kill_Vehicle [3]https://en.wikipedia.org/wiki/Multiple_Kill_Vehicle https://en.wikipedia.org/wiki/Multiple_Kill_Vehicle