President Donald Trump has ordered the resumption of US nuclear weapons testing for the first time since 1992, citing the testing programs of Russia and China.

• The US possesses approximately 5,225 nuclear warheads, while Russia has around 5,580, and China is a "distant third" but is expected to exceed 1,000 weapons by 2030.
• The directive came just before Trump's meeting with Chinese President Xi Jinping in South Korea.
• This move reverses a long-standing US policy, with the last test, code-named Divider, occurring on September 23, 1992, at an underground facility in Nevada.
• The announcement also precedes the expiration of the New Strategic Arms Reduction Treaty (New Start) in February 2026, the last remaining nuclear arms treaty between the US and Russia.