The United States and South Korea are deepening defense cooperation amid continued nuclear and missile provocations from North Korea.
Two leading Republican lawmakers say that Russian violations of a key nuclear treaty have worsened, leading them to worry about risks to U.S. forces and allies from intermediate-range ground-launched cruise missiles.
A high-level North Korean official recently warned that Pyongyang is prepared to launch a preemptive nuclear strike under threat from the United States.
Russia increased its deployed nuclear warheads over the past six months under a strategic arms reduction treaty as U.S. nuclear warhead stocks declined sharply, according to the State Department.
Hillary Clinton privately told supporters this year that she would likely scrap a major upgrade to the United States’ nuclear weapons program, according to leaked audio of her remarks.
North Korea will have enough material for about 20 nuclear bombs by the end of this year, with ramped-up uranium enrichment facilities and an existing stockpile of plutonium, according to new assessments by weapons experts.
North Korea conducted its fifth and biggest nuclear test on Friday and said it had mastered the ability to mount a warhead on a ballistic missile, ratcheting up a threat that its rivals and the United Nations have been powerless to contain.
The Obama administration will seek a formal political agreement at the United Nations that would legally bind the United States to a nuclear test ban treaty rejected by the Senate 17 years ago.