(CNN) — When Chinese leader Xi Jinping inserted a reference to “twists and turns” in his relationship with President Donald Trump in the opening remarks of their summit this week, he could hardly have ...

The directive took even many of Trump’s advisers off guard, according to officials, leading to unanswered questions about when, or if, the testing would actually begin. Historically, it is the ...

“With others doing testing, I think it’s appropriate that we do also,” Trump said aboard Air Force One as he was returning to Washington. He said nuclear test sites would be determined later, and ...