U.S. defense officials announced on the 19th that the military will build a new type of land-based intercontinental ballistic missile to replace the “minuteman-3” nuclear missile, which has been in service for 50 years, with an estimated cost of 95.8 billion US dollars. The Pentagon submitted an updated “militia 3” nuclear missile cost budget to the U.S. Congress last month, and it was not disclosed until the 19th. The new estimate is $10 billion higher than the budget reported four years ago for the same project. The United States is ready to complete a “near complete renewal” of its nuclear weapons in the coming decades, with an estimated total cost of more than $1.2 trillion. Former Defense Secretary William James Perry and others believe that intercontinental ballistic missiles are not necessary to ensure the national security of the United States, but the Pentagon said that such missiles are crucial to the goal of “suppressing war”. In a 2018 nuclear policy assessment report, President Donald Trump confirmed his government’s determination to deploy a new generation of intercontinental ballistic missiles. The report concludes that ICBM is “highly survivable enough to withstand any attack other than a large-scale nuclear attack”. The United States currently deploys 400 “militia 3” missiles equipped with a single nuclear warhead in underground silos in Montana and Nebraska. Constraints on the number of nuclear warheads include the new START treaty signed by the United States and Russia in 2010. The treaty expires in February 2021. Earlier this month, Russian President Vladimir Putin proposed to extend the treaty “unconditionally”, that is, without limiting the number of nuclear warheads, for at least one year, but the United States disagreed. In order to update its nuclear arsenal, the United States plans to build a new type of ballistic missile nuclear submarine to replace the existing “Ohio” class ballistic missile nuclear submarine, replace the B-2 stealth bomber with a new long-range portable nuclear warhead bomber, and build a new generation of air launched nuclear cruise missile and a new type of nuclear command and communication system. At the same time, the United States intends to replace nuclear warheads, including the replacement of nuclear warheads carried by intercontinental ballistic missiles with a budget of 14.8 billion US dollars. The U.S. nuclear weapons modernization and upgrading program was initiated by former President Barack Obama, and continued to be promoted after trump took office. Presidential candidate Joe Biden said he would consider trying to reduce the program if elected.