President Trump’s visit to Beijing comes as relations with China have become more combative.

Beijing welcomed President Trump with a high-ranking vice president, but the choice of a ceremonial leader suggests China is trading symbolism for substance.

The U.S. has pressed Argentina and Chile to review two Chinese telescope projects in the Andean deserts. Astronomers are worried about setbacks to research.

The Times unearthed memos that signaled a major shift in the court’s operations, in a decision that critics say was rushed and flawed.