As part of the Nuclear Policy Review program, it is planned to increase the number of intercontinental ballistic missiles, as well as the modernization of nuclear submarines. They will deploy nuclear warheads of short range. The program provides for the development of low-power rockets with low explosive power.
The US Defense Ministry says that Russia threatens with the use of smaller nuclear weapons, and therefore it is necessary to apply preventive measures to contain its ambitions. Also, do not forget about the nuclear program of the DPRK and Iran. The United States must comply with other countries with respect to nuclear weapons. The very doctrine of containing Russia will be published in the spring of 2018.
As reported in URA-Inform, the United States plans to begin patrolling the sea routes that lead to North Korea.