BUSAN, South Korea — President Donald Trump appeared to suggest the U.S. will resume testing nuclear weapons for the first time in three decades , saying it would be on an “equal basis” with Russia and China.

The Kremlin pointed out that a global ban on nuclear tests has remained in place, but warned that if any country resumes nuclear testing, Russia would follow suit.

There was no indication the U.S. would start detonating warheads, but Trump offered few details about what seemed to be a significant shift in U.S. policy.

He made the announcement on social media minutes before he met with Chinese leader Xi Jinping on Thursday in South Korea to discuss trade. He offered little clarity when he spoke to reporters later aboard Air Force One as he flew back to Washington.

The U.S. milita

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