President Vladimir V. Putin has never publicly mentioned the opposition leader’s name in 20 years of speeches and interviews. Why? He is “completely out of their control,” which is intolerable, one analyst says.

Under his watch at Tuol Sleng prison. Duch, whose real name was Kaing Guek Eav, said, “I considered it evil eating evil.”

Ibrahim Boubacar Keïta’s condition was not immediately known, and it was unclear whether he would be evacuated abroad for medical treatment.

Some researchers have begun testing experimental vaccines on themselves.

He was in Dubai for a meeting, then reappeared in Rwanda, where authorities said the famed hotelier was arrested on charges including terrorism, arson and murder.

Mr. Wolf escaped the Nazi occupation of Czechoslovakia and built a life as a garment manufacturer and lover of music in New York City. He was infected with the novel coronavirus.

Russia’s outbreak, TikTok deal, schools reopening: Here’s what you need to know.

One-third of passengers aboard a bus were infected by a fellow passenger, scientists reported.

In countries all over the world, students are heading back to school with varying degrees of safety precautions.

Recent altercations in Europe, the Middle East and off the coast of Alaska have heightened tensions between the two rival powers.