Right now, hopelessly outdated Minuteman missiles that first went into service in the 1970s form the backbone of our strategic nuclear arsenal.  The silos where they stand ready to be launched still use rotary phones and 8 inch floppy disks in many cases.  Once they are launched, the brand new S-500 anti-missile systems that the Russians have deployed will be able to intercept them.  Meanwhile, the Russians have introduced a brand new intercontinental ballistic missile known as the Sarmat.  A single Sarmat carries enough firepower to destroy an area the size of Texas, and our anti-missile systems are not able to deal with this new threat.  The balance of power has fundamentally shifted, and so we desperately need to update our capabilities.

Unfortunately, this process will not even begin until 2025.