Research finds that triathletes who train too hard can impair a brain area involved in achieving goals such as winning a race. Fatigued athletes choose immediate gratification over long-term rewards.

A whistleblower filed a complaint about President Trump's conversation with a foreign leader. Here is a redacted version of that complaint, cleared by the House intelligence committee.

The two-term French president was the first chief executive to acknowledge France's collaboration in the Holocaust. And he famously rejected U.S. calls to invade Iraq.

A government crackdown on China's Muslim minorities has reached the Hui. "The pressure on not just one's religious behavior, but how one lives one's daily life, is unbearable," says a young Hui man.