We've learned that lesson," Sullivan said.In February last year, Russian President Vladimir Putin withdrew from the 2010 New START treaty, which placed controls on the number of nuclear weapons that Russia and the US could have at their disposal.

WASHINGTON – North Korea, China, and Russia are expanding and diversifying their nuclear weapons stockpiles at a "breakneck" speed, a White House official said Friday, warning that absent a change in the trajectory of their arsenals,

The United States and allies South Korea and Japan have clashed with China and Russia over North Korea’s latest satellite and ballistic missile launches and threats to use nuclear weapons that have escalated tensions in northeast Asia.

"We will make certain adjustments to our posture and capabilities," a senior administration official said, adding that the U.S. believes it needs "to adopt a more competitive approach to non-proliferation and arms control" in light of rising global tensions.

The administration of US President Joe Biden intends to adopt a more decisive strategy regarding the non-proliferation of nuclear weapons worldwide, according to Semafor. A senior representative of the Biden administration told Semafor that the US sees the need to adopt a more competitive approach to arms control and nonproliferation in the