The escalating ballistic missile threat for the US had made them aware that missile defense is very significant. The reality check for the US happened when they were struck by missiles from Iran. The United States is known for having just 44GBIs and they are just deployed along the West coast. The rest of the East Coast and Gulf Coast are prone to threat and due to rising hostility, there is a need to protect the homeland from vulnerability. The current arrangement between the GBIs in Vandenberg Air Force Base and Fort Greely is not enough, so there is a need for near-term solutions. In 2016, the MDA recognized the need for modernization and they developed a warhead for GBI. The new replacement was designed to be more cost-effective, reliable, and easier to use produce.
By 2020 the RKV was supposed to reach full capacity. Few test opportunities and budget cuts foiled the plan and this ultimately led to the project to be killed in 2019. The pentagon is now keen on developing a Next Generation Interceptor (NGI). One of the positive news for the US is that the NGI is evolving well and it is expected to defend the country from Missile attacks very soon.